About the data: We used the family income data from the 2013 American Community Survey. This counts only families, which the government defines as households with two or more people related by birth, marriage or adoption. The graph focuses on families living in the country's 30 most populous cities.
Diseases and conditions that may cause edema include: 1  Congestive heart failure. 2  Cirrhosis. 3  Kidney disease.  Kidney 1  damage. Weakness or damage to veins in your legs.  Inadequate lymphatic 1  system. Symptoms.  Risk factors.
Best Answer: Swelling (a.k.a. edema) is caused by a buildup of fluids. When this happens in the legs, ankles, and/or feet, it's called peripheral edema. Swollen feet (or ankles, or legs) can have a wide variety of causes that may be related to one or more of the following: * sitting or standing too long. * injury or trauma.