Trichology is the study of the

hair Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and ...

and

scalp The scalp is the area of the head where head hair grows. It is made up of skin, layers of connective and fibrous tissues, and the membrane of the skull. Anatomically, the scalp is part of the epicranium, a collection of structures covering th ...

. The term derives from

Ancient Greek Ancient Greek (, ; ) includes the forms of the Greek language used in ancient Greece and the classical antiquity, ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Greek ...

θρίξ (''thríx''), "hair" and -λογία ''

-logia ''-logy'' is a suffix in the English language, used with words originally adapted from Ancient Greek ending in ('). The earliest English examples were anglicizations of the French '' -logie'', which was in turn inherited from the Latin '' -lo ...

''. In most jurisdictions the title of a ''trichologist'', not the field of trichology, is considered a para-medical discipline. The Institute of Trichologists was founded in 1902. The first journal for the field, International Journal of Trichology, was founded in 2009.

Diseases

Alopecia Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. Typically at least the head is involved. The severity of hair loss can vary from a small area to the entire body. Inflammation or scarring ...

** Alopecia areata ** Alopecia universalis ** Frictional alopecia ** Frontal fibrosing alopecia ** Loose anagen syndrome ** Pattern hair loss (''Androgenic alopecia'') **

Scarring A scar (or scar tissue) is an area of fibrous tissue that replaces normal skin after an injury. Scars result from the biological process of wound repair in the skin, as well as in other organs, and tissues of the body. Thus, scarring is a nat ...

and non scarring hair loss *Hair colour ** Canities subita ** Premature greying of hair * The hair root &

hair follicle The hair follicle is an organ found in mammalian skin. It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions. The hair follicle regulates hair growth via a complex interaction betwee ...

disorders ** Telogen effluvium ** Trichostasis spinulosa * Hirsutism ** Trichomegaly *Pathogenic ** Microsporum audouinii ** Piedraia hortae ** Tinea capitis ** Trichobacteriosis axillaris

Diagnosis

Blood test A blood test is a medical laboratory, laboratory analysis performed on a blood sample that is usually extracted from a vein in the arm using a hypodermic needle, or via fingerprick. Multiple tests for specific blood components, such as a glucose ...

Vitamin deficiency Vitamin deficiency is the condition of a long-term lack of a vitamin. When caused by not enough vitamin intake it is classified as a ''primary deficiency'', whereas when due to an underlying disorder such as malabsorption it is called a ''second ...

* Hair analysis **Scalp Biopsy *

Hamilton–Norwood scale The Hamilton–Norwood scale is used to classify the stages of male pattern baldness. It is a widely accepted and reproducible classification system for male pattern hair loss (androgenetic alopecia). The stages are described with a number from ...

Ludwig scale The Ludwig scale is a method of classifying female pattern baldness (androgenic alopecia), and ranges from stages I to III. Stage I begins with thinning on the top of the head. In stage II the scalp starts to show. All of the hair at the crown ...

* Trichoscopy

Subspecialties

Trichology includes subspecialties that deal either with certain diseases or diseases of certain parts of the hair. Some of them are: * Hair cloning * Hair removal * Management of hair loss **

Hair transplantation Hair transplantation is a surgery, surgical technique that removes hair follicles from one part of the body, called the 'donor site', to a bald or balding part of the body known as the 'recipient site'. The technique is primarily used to treat ...

Cosmetic

*Hair care ** Curly Girl Method *Hygiene ** Dry shampoo

Treatment

* Collagen induction therapy **Microneedling * Low-level laser therapy * Platelet-rich plasma *Oral or topical pharmaceuticals ** Antiandrogen or 5α-Reductase inhibitor’s ***

Dutasteride Dutasteride, sold under the brand name Avodart among others, is a medication primarily used to treat the symptoms of a benign prostatic hyperplasia (BPH), an enlarged prostate not associated with cancer. A few months may be required before bene ...

Finasteride Finasteride, sold under the brand names Proscar and Propecia among others, is a medication used to treat pattern hair loss and benign prostatic hyperplasia (BPH) in men. It can also be used to treat hirsutism, excessive hair growth in women. It ...

Antifungal An antifungal medication, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis (thrush), serious systemic infections such as ...

***

Ketoconazole Ketoconazole, sold under the brand name Nizoral, among others, is an antiandrogen, antifungal drug, antifungal, and antiglucocorticoid medication used to treat a number of fungal infections. Applied to the skin it is used for fungal skin inf ...

** Antihypertensive *** Minoxidil

Trichology community

Associations

*International Association of Trichologists (IAT) **American Hair Research Society (AHRS) **Australasian Hair and Wool Research Society **European Hair Research Society (EHRS) **Hair Research Society of India **Korean Hair Research Society (KHRS) **Russian Hair Research Society (RHRS) **Society for Hair Research Japan **Ukraine Hair Research Society (UHRS) **World Congress for Hair Research *The Institute of Trichologists *International Society of Hair Restoration Surgery *The Trichological Society

Journals

*'' International Journal of Trichology'' *''Trichology and Cosmetology''

Notable trichologists

* Lidia Rudnicka * Desmond Tobin * Antonella Tosti * Shuna Hammocks

Cosmetic

* Mark Constantine * Philip Kingsley

References

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