what constitute body fluids collect to cause swelling
Edema is swelling or puffiness of a tissue due to excessive accumulation of fluid. Water or other body fluids collect in the cells and cause the swelling. Diuretics are used to treat edema. Edema commonly occurs in the feet and legs, where it is referred to as peripheral edema. Accumulation of fluid in the interstitial air spaces in the lungs disorder is called pulmonary edema.