When swelling is noticed in the legs, ankles and feet of both sides of the body (also called edema) and does not correlate with an injury, it is often due to heart and kidney failure and problems with veins in the legs. If left untreated, this can cause pain and even lead to open wounds on the legs which can be difficult to treat. If you have a recent increase in swelling in both legs, contact your primary care doctor and if the conditions above are not at play they may send you our way for further evaluation!