The process or technique of tattooing, creating a
tattoo
A tattoo is a form of body modification made by inserting tattoo ink, dyes, or pigments, either indelible or temporary, into the dermis layer of the skin to form a design. Tattoo artists create these designs using several tattooing processes ...
, involves the insertion of
pigment
A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored sub ...
(via
tattoo ink
Tattoo inks consist of pigments combined with a carrier, used in the process of tattooing to create a tattoo in the skin. These inks are also used for permanent makeup, a form of tattoo.
Professional tattoo inks are available in many colors and ...
) into the skin's
dermis
The dermis or corium is a layer of skin between the epidermis (skin), epidermis (with which it makes up the cutis (anatomy), cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from s ...
. Traditionally, tattooing often involved rubbing pigment into cuts. Modern tattooing almost always requires the use of a
tattoo machine and often procedures and accessories to reduce the risk to human health.
Physiological process of tattooing
Tattooing involves the placement of pigment into the skin's
dermis
The dermis or corium is a layer of skin between the epidermis (skin), epidermis (with which it makes up the cutis (anatomy), cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from s ...
, the layer of dermal tissue underlying the
epidermis
The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and Subcutaneous tissue, hypodermis. The epidermal layer provides a barrier to infection from environmental pathogens and regulates the ...
. After initial injection, pigment is dispersed throughout a
homogenized damaged layer down through the epidermis and upper dermis, in both of which the presence of foreign material activates the
immune system
The immune system is a network of biological systems that protects an organism from diseases. It detects and responds to a wide variety of pathogens, from viruses to bacteria, as well as Tumor immunology, cancer cells, Parasitic worm, parasitic ...
's
phagocyte
Phagocytes are cells that protect the body by ingesting harmful foreign particles, bacteria, and dead or dying cells. Their name comes from the Greek ', "to eat" or "devour", and "-cyte", the suffix in biology denoting "cell", from the Greek ...
s to engulf the pigment particles. As healing proceeds, the damaged epidermis flakes away (eliminating surface pigment) while deeper in the skin
granulation tissue
Granulation tissue is new connective tissue and microscopic blood vessels that form on the surfaces of a wound during the healing process. Granulation tissue typically grows from the base of a wound and is able to fill wounds of almost any size ...
forms, which is later converted to connective tissue by
collagen
Collagen () is the main structural protein in the extracellular matrix of the connective tissues of many animals. It is the most abundant protein in mammals, making up 25% to 35% of protein content. Amino acids are bound together to form a trip ...
growth. This mends the upper dermis, where pigment remains trapped within
fibroblast
A fibroblast is a type of cell (biology), biological cell typically with a spindle shape that synthesizes the extracellular matrix and collagen, produces the structural framework (Stroma (tissue), stroma) for animal Tissue (biology), tissues, and ...
s, ultimately concentrating in a layer just below the dermis/epidermis boundary. Its presence there is stable, but in the long term (decades) the pigment tends to migrate deeper into the dermis, accounting for the degraded detail of old tattoos.
[Tattoo lasers / Histology]
Suzanne Kilmer, eMedicine
eMedicine is an online clinical medical knowledge base founded in 1996 by doctors Scott Plantz and Jonathan Adler, and computer engineers Joanne Berezin and Jeffrey Berezin. The eMedicine website consists of approximately 6,800 medical topic revi ...
Traditional tattooing

Some tribal cultures traditionally created tattoos by cutting designs into the skin and rubbing the resulting wound with ink, ashes or other agents; some cultures continue this practice, which may be an adjunct to
scarification
Scarification involves scratching, etching, burning/ branding, or superficially cutting designs, pictures, or words into the skin as a permanent body modification or body art. The body modification can take roughly 6–12 months to heal. In t ...
. Some cultures create tattooed marks by hand-tapping the ink into the skin using sharpened sticks or animal bones (made like needles) with clay formed disks or, in modern times, needles. Traditional Japanese tattoos (''
irezumi
(also spelled or sometimes ) is the Japanese word for tattoo, and is used in English to refer to a distinctive style of Japanese tattooing, though it is also used as a blanket term to describe a number of tattoo styles originating in Japan, inc ...
'') are still "hand-poked", that is, the ink is inserted beneath the skin using non-electrical, hand-made and hand held tools with needles of sharpened bamboo or steel. This method is known as ''tebori''. Similarly,
Sak Yant tattoos from Southeast Asia (mostly Thailand) are traditionally hand-poked using steel or (now rarely) bamboo rod finished with a needle, called Khem Sak.
Traditional Hawaiian hand-tapped tattoos are experiencing a renaissance, after the practice was nearly extinguished in the years following Western contact. The process involves lengthy protocols and prayers and is considered a sacred rite more than an application of artwork. The tattooist chooses the design, rather than the wearer, based on genealogical information. Each design is symbolic of the wearer's personal responsibility and role in the community. Tools are hand-carved from bone or tusk without the use of metal.
["Marked"](_blank)
Article by Shannon Wianecki in ''Maui No Ka 'Oi Magazine
Maui (; Hawaiian: ) is the second largest island in the Hawaiian archipelago, at 727.2 square miles (1,883 km2). It is the 17th-largest in the United States. Maui is one of Maui County's five islands, along with Molokai, Lānai, K ...
'', Vol.15 No. 4 July 2011
Modern tattooing
The most common method of tattooing in modern times is the electric
tattoo machine, which inserts ink into the skin via a single needle or a group of needles that are
solder
Solder (; North American English, NA: ) is a fusible alloy, fusible metal alloy used to create a permanent bond between metal workpieces. Solder is melted in order to wet the parts of the joint, where it adheres to and connects the pieces aft ...
ed onto a bar, which is attached to an oscillating unit. The unit rapidly and repeatedly drives the needles in and out of the skin, usually 80 to 150 times a second. This modern procedure is ordinarily sanitary. The needles are single-use needles that come packaged individually. The tattoo artist must wash his or her hands and must also wash the area that will be tattooed. Gloves must be worn at all times and the wound must be wiped frequently with a wet disposable towel of some kind. The equipment must be sterilized in a certified autoclave before and after every use.
Prices for this service vary widely globally and locally, depending on the complexity of the tattoo, the skill and expertise of the artist, the attitude of the customer, the costs of running a business, the economics of supply and demand, etc. The time it takes to get a tattoo is in proportion with its size and complexity. A small one of simple design might take 15 minutes, whereas an elaborate
sleeve tattoo or back piece requires multiple sessions that may consist of several hours at a time ranging over months or even years.
In 1891 the first electric tattoo needle was patented in New York City by
Samuel O'Reilly, who modified Thomas Edison's
electric engraving pen.
O'Reilly's machine was based on the rotary technology of the electric
engraving
Engraving is the practice of incising a design on a hard, usually flat surface by cutting grooves into it with a Burin (engraving), burin. The result may be a decorated object in itself, as when silver, gold, steel, or Glass engraving, glass ar ...
device invented by
Thomas Edison
Thomas Alva Edison (February11, 1847October18, 1931) was an American inventor and businessman. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, ...
.
Modern tattoo machines use
electromagnetic coil
An electromagnetic coil is an electrical Electrical conductivity, conductor such as a wire in the shape of a wiktionary:coil, coil (spiral or helix). Electromagnetic coils are used in electrical engineering, in applications where electric curre ...
s. Another early tattoo machine, with an electromagnetic coil, was patented by
Sutherland MacDonald in 1894.
The first twin-coil machine, the predecessor of the modern configuration, was invented by another Englishman, Alfred Charles South of London, in 1899. The rotary tattoo machine was developed from 1974 to 1978 by the German tattoo artists
Horst Streckenbach (1929–2001) and
Manfred Kohrs.
Permanent makeup
Permanent makeup or semi-permanent makeup tattoos are cosmetic tattoos that are meant to alter pigmentation in the facial features. Some types of permanent makeup are used for medical conditions, such as to cover up scars or
vitiligo
Vitiligo (, ) is a chronic autoimmune disorder that causes patches of skin to lose pigment or color. The cause of vitiligo is unknown, but it may be related to immune system changes, genetic factors, stress, or sun exposure, and susceptibili ...
, while other types are simply for aesthetic reasons like tattooing eyeliner, lip color or eyebrows. The pigment is inserted into the surface of the skin in patterns to be able to cover the desired areas.
Permanent makeup is typically done with some form of tattoo machine. There are machines now that are needle-less which should result in less painful procedures. These needle-free devices are considered safer and more sterile to use than traditional tattoo machines. They are designed to create a more comforting experience during the application process and eliminate the possibility of spreading disease like
HIV
The human immunodeficiency viruses (HIV) are two species of '' Lentivirus'' (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), a condition in which progressive failure of the im ...
,
hepatitis
Hepatitis is inflammation of the liver parenchyma, liver tissue. Some people or animals with hepatitis have no symptoms, whereas others develop yellow discoloration of the skin and whites of the eyes (jaundice), Anorexia (symptom), poor appetite ...
and other healthcare issues.
The needle-less device is also capable of inserting the pigment deeper into the skin than machines that use needles.
There are several different ways to get rid of these tattoos, the most common being laser removals. It is suggested that different color pigments should be removed with different lasers in order to reduce the risk of scarring and ink retention. The needle-free machines also have the capability of removing or lightening the pigment from the skin as well by adding in a removal solution into the skin.
Permanent makeup or micropigmentation is much like any tattoo and can have side effects over time. Infections, fading, scarring, inflammation, and allergic reactions are just a few of the side effects that have been reported from patients who received permanent makeup procedures.
Nipple-areola Tattoos
Tattoos have also made an entrance into the medical field. Nipple-areola tattoos are a form of medical tattoos that can be done for those who lost their nipple during a mastectomy and had breast reconstruction surgery. The tattoo artist tries to recreate the same pigment and shape as the original nipple and areola, although it may not always result in an exact replica as the patient's old nipple. The tattoo may not be the exact or desired shade of the nipple that the patient originally had because the artist may make the tattoo a bit darker in order for the tattoo to lighten up over time, ultimately resulting in the correct shade. The machine that is used during the procedure will also affect the color that the tattoo has and how the pigment will react with the skin.
Not all nipple-areola tattoos are successful. There is a chance that the tattoo could get infected just as any tattoo can. In a study from 1988—1993 of 103 patients who received nipple-areola tattoos, 5 patients reported getting an infection, 1 patient reported getting a rash, one reported getting slough, and 19 patients had to have their tattoo touched up due to the pigment diminishing from the tattoo through the healing process.
Nipple-areola tattoos tend to be one of the final steps to breast reconstruction surgery. In the study of those who received the tattoos, 86% said that they would get the procedure done again if they needed to.
Dyes and pigments

Early tattoo inks were obtained directly from nature and were extremely limited in pigment variety. In ancient Hawaii, for example,
kukui
''Aleurites moluccanus'', commonly known as candlenut, is a tree in the spurge family Euphorbiaceae. It grows to about tall and produces drupe fruit.
First described by Carl Linnaeus in 1753, the species' origin is unclear due to its spread b ...
nut ash was blended with coconut oil to produce an ebony ink.
Today, an almost unlimited number of colors and shades of tattoo ink are mass-produced and sold to parlors worldwide. Tattoo artists commonly mix these inks to create their own unique pigments.
A wide range of
dye
Juan de Guillebon, better known by his stage name DyE, is a French musician. He is known for the music video of the single "Fantasy
Fantasy is a genre of speculative fiction that involves supernatural or Magic (supernatural), magical ele ...
s and
pigment
A pigment is a powder used to add or alter color or change visual appearance. Pigments are completely or nearly solubility, insoluble and reactivity (chemistry), chemically unreactive in water or another medium; in contrast, dyes are colored sub ...
s can be used in tattoos, from inorganic materials like
titanium dioxide
Titanium dioxide, also known as titanium(IV) oxide or titania , is the inorganic compound derived from titanium with the chemical formula . When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or Colour Index Internationa ...
and
iron oxide
An iron oxide is a chemical compound composed of iron and oxygen. Several iron oxides are recognized. Often they are non-stoichiometric. Ferric oxyhydroxides are a related class of compounds, perhaps the best known of which is rust.
Iron ...
s to
carbon black
Carbon black (with subtypes acetylene black, channel black, furnace black, lamp black and thermal black) is a material produced by the incomplete combustion of coal tar, vegetable matter, or petroleum products, including fuel oil, fluid cataly ...
,
azo dye
Azo dyes are organic compounds bearing the functional group R−N=N−R′, in which R and R′ are usually aryl and substituted aryl groups. They are a commercially important family of azo compounds, i.e. compounds containing the C−N=N−C l ...
s, and
acridine
Acridine is an organic compound and a nitrogen heterocycle with the formula C13H9N. Acridines are substituted derivatives of the parent ring. It is a planar molecule that is structurally related to anthracene with one of the central CH groups ...
,
quinoline
Quinoline is a heterocyclic aromatic organic compound with the chemical formula C9H7N. It is a colorless hygroscopic liquid with a strong odor. Aged samples, especially if exposed to light, become yellow and later brown. Quinoline is only sl ...
,
phthalocyanine
Phthalocyanine () is a large, aromatic, macrocyclic, organic compound with the formula and is of theoretical or specialized interest in chemical dyes and photoelectricity.
It is composed of four isoindole units linked by a ring of nitrogen ato ...
and
naphthol Naphthol may refer to:
* 1-Naphthol
1-Naphthol, or α-naphthol, is an organic compound with the formula . It is a fluorescent white solid. 1-Naphthol differs from its isomer 2-naphthol by the location of the hydroxyl group on the naphthalene ...
derivatives, dyes made from ash, and other mixtures. Iron oxide pigments are used in greater extent in
cosmetic tattooing.
Concern has been expressed over the interaction between
magnetic resonance imaging
Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and ...
(MRI) procedures and tattoo pigments, some of which contain
trace metal
Trace metals are the metals subset of trace elements; that is, metals normally present in small but measurable amounts in animal and plant cells and tissues. Some of these trace metals are a necessary part of nutrition and physiology. Some bi ...
s. The
magnetic field
A magnetic field (sometimes called B-field) is a physical field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular ...
s produced by MRI machines interact with these metals, including
nonferrous metal particles, and while rare, are capable of causing first-degree or second-degree burns or distortions in the image. The type and density of the ink as well as shape of the tattoo may increase the risk, particularly if the shape approximates an RF pick-up loop. The television show ''
MythBusters
''MythBusters'' is a science entertainment television series created by Peter Rees (producer), Peter Rees and produced by Beyond International in Australia. The series premiered on the Discovery Channel on January 23, 2003. It was broadcast in ...
'' tested the hypothesis, and found a slight interaction between commonly used tattoo inks and MRI. The interaction was stronger with inks containing high levels of iron oxide.
Studio hygiene
Procedures

The properly equipped
tattoo studio will use
biohazard
A biological hazard, or biohazard, is a biological substance that poses a threat (or is a hazard) to the health of living organisms, primarily humans. This could include a sample of a microorganism, virus or toxin that can adversely affect huma ...
containers for objects that have come into contact with blood or
bodily fluid
Body fluids, bodily fluids, or biofluids, sometimes body liquids, are liquids within the body of an organism. In lean healthy adult men, the total body water is about 60% (60–67%) of the total body weight; it is usually slightly lower in wom ...
s,
sharps container Sharps may refer to:
* Plural form of many of the terms as defined on Sharp (disambiguation)
* Sharps waste, a form of biomedical waste composed of used ''sharps''
* Sharps, Virginia, unincorporated community in Richmond County
* Sharps Bedrooms ...
s for old
needles, and an
autoclave
An autoclave is a machine used to carry out industrial and scientific processes requiring elevated temperature and pressure in relation to ambient pressure and/or temperature. Autoclaves are used before surgical procedures to perform steriliza ...
for sterilizing tools. Certain jurisdictions also require studios by law to have a sink in the work area supplied with both hot and cold water.
Proper hygiene requires a body modification artist to wash his or her hands before starting to prepare a client for the stencil, between clients, and at any other time when
cross contamination can occur. The use of single use gloves is also mandatory and disposed after each stage of tattooing. The same gloves should not be used to clean the tattoo station, tattoo the client, and clean the tattoo.
In some states and countries it is illegal to tattoo a
minor even with parental consent, and (except in the case of
medical tattoos) it is forbidden to tattoo impaired persons, people with contraindicated skin conditions, those who are pregnant or nursing, those incapable of consent due to mental incapacity, or those under the influence of
alcohol
Alcohol may refer to:
Common uses
* Alcohol (chemistry), a class of compounds
* Ethanol, one of several alcohols, commonly known as alcohol in everyday life
** Alcohol (drug), intoxicant found in alcoholic beverages
** Alcoholic beverage, an alco ...
or other
drug
A drug is any chemical substance other than a nutrient or an essential dietary ingredient, which, when administered to a living organism, produces a biological effect. Consumption of drugs can be via insufflation (medicine), inhalation, drug i ...
s.
Before the tattooing begins the client is asked to approve the final position of the applied stencil. After approval is given the artist will open new, sterile needle packages in front of the client, and always use new, sterile, or sterile disposable instruments and supplies, and fresh ink for each session (loaded into disposable ink caps which are discarded after each client). Also, all areas which may be touched with contaminated gloves will be wrapped in clear plastic to prevent cross-contamination. Equipment that cannot be autoclaved (such as counter tops, machines, and furniture) will be wiped with an approved disinfectant.
Incentives for continuing education
Membership in professional organizations or certificates of appreciation/achievement generally help artists to be aware of the latest trends. Most tattooists do not belong to any association.
Training and certification requirements
While specific requirements to become a tattooist vary between jurisdictions, many mandate only formal training in blood borne pathogens and cross contamination. The local department of health regulates tattoo studios in many jurisdictions. For example, according to the health departments in
Oregon
Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...
and
Hawaii
Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...
, tattoo artists in these states are required to take and pass a test ascertaining their knowledge of health and safety precautions as well as the current state regulations. Performing a tattoo in Oregon without a proper and current license or in an unlicensed facility is a
felony
A felony is traditionally considered a crime of high seriousness, whereas a misdemeanor is regarded as less serious. The term "felony" originated from English common law (from the French medieval word "''félonie''") to describe an offense that r ...
offense. Tattooing was legalized in
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive w ...
in 1997, in Massachusetts in 2000 and Oklahoma between 2002 and 2006.
Aftercare
Tattoo artists and people with tattoos vary widely in their preferred methods of caring for new tattoos. Some artists recommend keeping a new tattoo wrapped for the first 24 hours while others suggest removing temporary bandaging after two hours or less to allow the skin to breathe. Many tattooists advise against allowing too much contact with hot tub, pool water or soaking in a tub for the first two weeks to prevent the tattoo ink from washing out. In contrast other artists suggest that a new tattoo be bathed in very hot water early.
General consensus for care advises against removing the flakes or scab that may form on a new tattoo, and avoiding exposing a new tattoo to the sun for extended periods for at least three weeks; both of these can contribute to fading of the image. It is agreed that a new tattoo needs to be kept clean. Various products may be recommended for application to the skin, ranging from those intended for the treatment of cuts, burns and scrapes, to
panthenol
Panthenol (also called pantothenol) is the alcohol analog of pantothenic acid (vitamin B5), and is thus a provitamin of B5. In organisms, it is quickly oxidized to pantothenic acid. It is a viscous transparent liquid at room temperature. Panth ...
,
cocoa butter
Cocoa butter, also called theobroma oil, is a pale-yellow, edible Vegetable oil, fat extracted from the cocoa bean (''Theobroma cacao''). It is used to make chocolate, as well as some ointments, toiletries, and pharmaceuticals. Cocoa butter h ...
,
A&D,
hemp
Hemp, or industrial hemp, is a plant in the botanical class of ''Cannabis sativa'' cultivars grown specifically for industrial and consumable use. It can be used to make a wide range of products. Along with bamboo, hemp is among the fastest ...
,
lanolin
Lanolin (from Latin 'wool', and 'oil'), also called wool fat, wool yolk, wool wax, sheep grease, sheep yolk, or wool grease, is a wax secreted by the sebaceous glands of wool-bearing animals. Lanolin used by humans comes from domestic sheep br ...
, or
salves. Oil based ointments are almost always recommended for use on very thin layers due to their inability to evaporate and therefore over-hydrate the already perforated skin. Recent scientific studies have demonstrated that wounds that are kept moist heal faster than wounds healing under dry conditions.
In recent years specific commercial products have been developed for tattoo aftercare. Although opinions about these products vary, soap and warm water work well to keep a tattoo clean and free from infection.
It is advised that fragrance-free soaps and soaps that contain alcohol not be used to clean the tattoo to avoid burning or drying out the tattoo too quickly. Try to avoid loofahs and unwashed clothes which both can contain bacteria that could get into the tattoo and cause an infection. The best way to dry your tattoo is to use a paper towel as regular towels may also contain bacteria, even if they are just washed.
The amount of ink that remains in the skin throughout the healing process determines how the final tattoo will look. If a tattoo becomes infected or the flakes fall off too soon (e.g., if it absorbs too much water and sloughs off early or is picked or scraped off) then the ink will not be properly fixed in the skin and the final image will be negatively affected.
Regulations
France has had hygiene regulations for tattooing and piercing since 2008. On March 6, 2013, France banned the use of nine common color tattoo inks, including red, orange, and yellow pigments. The ban took effect on January 1, 2014. Tattoo artists in
France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
must comply with the hygiene and safety regulations of the National Health Security Agency (ANSM). If they violate the regulations, they can be fined up to €1,500.
The
European Union
The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
banned the use of 25 red, orange, and yellow color tattoo inks on January 4, 2022. The ban on the Blue 15:3 and Green 7 pigments is scheduled to take effect in 2023.
Vietnam
Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...
still considers tattoos to be a sensitive issue and has many restrictive regulations. According to Vietnamese law, tattoos are not completely banned.
However, there are some cases in which tattoos are not allowed, including: People under the age of 18, people with mental illness or other conditions that could affect the tattoo, people who are currently serving a prison sentence.
In the
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
there is no federal law regulating the practice of
tattooing
A tattoo is a form of body modification made by inserting tattoo ink, dyes, or pigments, either indelible or temporary, into the dermis layer of the Human skin, skin to form a design. Tattoo artists create these designs using several Process of ...
.
However, all 50 states and the
District of Columbia
Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and Federal district of the United States, federal district of the United States. The city is on the Potomac River, across from ...
have statutory laws requiring a person receiving a tattoo be at least 18 years old. This is partially based on the legal principle that a minor cannot enter into a legal contract or otherwise render
informed consent
Informed consent is an applied ethics principle that a person must have sufficient information and understanding before making decisions about accepting risk. Pertinent information may include risks and benefits of treatments, alternative treatme ...
for a procedure. Most states permit a person under the age of 18 to receive a tattoo with permission of a parent or guardian, but some states prohibit tattooing under a certain age regardless of permission, with the exception of medical necessity (such as markings placed for
radiation therapy
Radiation therapy or radiotherapy (RT, RTx, or XRT) is a therapy, treatment using ionizing radiation, generally provided as part of treatment of cancer, cancer therapy to either kill or control the growth of malignancy, malignant cell (biology), ...
).
References
{{Tattoo
Tattooing
Articles containing video clips
Tattoos by type