Congestion may refer to:

Medicine

*Excessive fluid in tissues, vessels, or both, including: **

Edema Edema, also spelled oedema, and also known as fluid retention, dropsy, hydropsy and swelling, is the build-up of fluid in the body's tissue. Most commonly, the legs or arms are affected. Symptoms may include skin which feels tight, the area ma ...

, abnormal accumulation of fluid in the

interstitium The interstitium is a contiguous fluid-filled space existing between a structural barrier, such as a cell membrane or the skin, and internal structures, such as organs, including muscles and the circulatory system. The fluid in this space is ...

, manifesting as swelling ***

Peripheral edema Peripheral edema is edema (accumulation of fluid causing swelling) in tissues perfused by the peripheral vascular system, usually in the lower limbs. In the most dependent parts of the body (those hanging distally), it may be called dependent ed ...

, edema in peripheral body parts such as limbs and feet ***

Pulmonary edema Pulmonary edema, also known as pulmonary congestion, is excessive liquid accumulation in the tissue and air spaces (usually alveoli) of the lungs. It leads to impaired gas exchange and may cause hypoxemia and respiratory failure. It is du ...

, edema in the lungs that impairs breathing **

Congestive heart failure Heart failure (HF), also known as congestive heart failure (CHF), is a syndrome, a group of signs and symptoms caused by an impairment of the heart's blood pumping function. Symptoms typically include shortness of breath, excessive fatigue, ...

, heart failure resulting in congestion in one or more organs **

Nasal congestion Nasal congestion is the blockage of nasal breathing usually due to membranes lining the nose becoming swollen from inflamed blood vessels. Background In about 85% of cases, nasal congestion leads to mouth breathing rather than nasal breathing. ...

, the blockage of nasal passages due to swollen membranes **

Prostatic congestion Prostatic congestion is a medical condition of the prostate gland that happens when the prostate becomes swollen by excess fluid and can be caused by prostatosis. The condition often results in a person with prostatic congestion feeling the urge t ...

, a medical condition that happens when the prostate becomes swollen by excess fluid

Other uses

Network congestion Network congestion in data networking and queueing theory is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle. Typical effects include queueing delay, packet loss or the blocking ...

, reduced quality of service when a network is carrying more data than it can handle *

Traffic congestion Traffic congestion is a condition in transport that is characterized by slower speeds, longer trip times, and increased vehicular queueing. Traffic congestion on urban road networks has increased substantially since the 1950s. When traffic d ...

, vehicles clogging streets and highways *

Congestion pricing Congestion pricing or congestion charges is a system of surcharging users of public goods that are subject to congestion through excess demand, such as through higher peak charges for use of bus services, electricity, metros, railways, t ...

, a system of surcharging users of public goods that are subject to congestion through excess demand * ''Congestion'' (film), a 1918 silent film {{disambiguation