The abnormal buildup of fluid in the body is called edema. Edema is Swelling caused by excess fluid in body tissues.It is the sign of inflammation. Edema is commonly seen in the feet and ankles, because of the effect of gravity, swelling is particularly noticeable in feet and ankles.Common causes of edema are prolonged standing, prolonged sitting, pregnancy, being overweight, and the increase in age.Minor lower-leg swelling that comes and goes isn't a huge concern. But if foot and ankle swelling is frequent, painful or persists for several weeks,it may be serious.In the cases the edema is the most prominent