An accumulation of an excessive amount of watery fluid in cells, tissues, or serous cavities (swelling).
Edema means swelling by an excessive amount of watery fluid accumulated in the intercellular spaces, most commonly present in subcutaneous tissue. It usually occurs in the feet, ankles and legs, but it can involve the entire body.
Edema may be brought on by eating too much salt, sunburn, heart failure, kidney disease, cirrhosis of the liver, pregnancy, lymph node disorder, medicines, exercise in warm temperatures. Diuretics may be given as medication for edema.