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.
Foot, leg, and ankle swelling. Painless swelling of the feet and ankles is a common problem, especially among older people. Abnormal buildup of fluid in the ankles, feet, and legs can cause swelling. This fluid buildup and swelling is called edema. Painless swelling may affect both legs and may include the calves or even the thighs. The effect of gravity makes the swelling most noticeable in the lower part of the body.
A very common place to see edema is in the feet, ankles and lower legs. Edema is fluid build up which may occur in any part of your body. However, due of the effects of gravity, the fluid more commonly appears as painless swelling in the lower legs.ommon Causes of Peripheral Edema. As a person gets on in years, he or she is more likely to have a gathering of edema fluid in their lower legs when they stand or sit too long. They may also see a tightness and swelling the shoes and socks are removed at the end of the day.