Swelling (medical)

Swelling
Other names	Turgescence, tumefaction
Left and right ring fingers of the same individual. The distal phalanx of the finger on the right exhibits swelling due to acute paronychia.

"Swollen" redirects here. For the Hetch Hetchy album, see Swollen (album). For the Jack Off Jill song, see Sexless Demons and Scars.

Swelling is a transient abnormal enlargement of a body part or area caused not by neoplasm (proliferation of cells) but by accumulation of interstitial fluid (fluid in tissues). It can occur throughout the body (generalized), or it can affect a specific part or organ (localized). Swelling is usually not dangerous and is a common reaction to an inflammation or a bruise.

Swelling is considered one of the five characteristics of inflammation; along with pain, heat, redness, and loss of function.

A body part may swell in response to injury, infection, or disease. Swelling, especially of the ankle, can occur if the body is not circulating fluid well. If water retention progresses to a symptomatic extent, swelling results.

Generalized swelling, or massive edema (also called anasarca), is a common sign in severely ill people. Although slight edema may be difficult to detect to the untrained eye, especially in an overweight person, massive edema is very obvious.

Types

Traumatic swellings develop immediately after trauma, like a hematoma or dislocation.

Congenital swellings are present since birth, such as a hemangioma or meningocele. Some congenital swellings may not be discovered until later in life, such as a branchial cyst, dermoid cyst, or thyroglossal cyst.

Inflammatory swelling may be either acute or chronic. The presentations of acute swellings are redness, local fever, pain and impairment of function of the affected organ. The related lymph nodes will be affected and will show signs of acute lymphadenitis. Chronic inflammatory swellings will show the signs of acute inflammatory swellings, but in subdued form. In this case, edema might not occur. Chronic swellings can be differentiated from neoplastic swellings by the fact that neoplastic swellings never recede in size, but inflammatory swellings may show occasional diminution.

Causes

Allergic reaction Cellulitis Contact dermatitis

Eczema Hives Insect bite

Insect sting Parasitic infection Skin infection

Causes of generalized swelling:

Beri-beri Celiac disease Certain medications Cirrhosis of the liver Chronic hepatitis

Congestive heart failure Edema Excessive IV therapy Filariasis Glomerulonephritis

Heart failure Kidney conditions Kidney failure Liver condition Lymphedema

Lymphatic obstruction Malabsorption Malnutrition Nephritis Nephrotic syndrome

Preeclampsia Pregnancy Premenstrual syndrome Protein deficiency Thyroid condition Ulcerative colitis Varicose veins

Some possible causes of a swollen limb include:

Allergic reaction Cancer

Lymphatic obstruction Sunburn Venous thrombosis

See also

• Carpometacarpal bossing
• Edema
• Tumescence