Leg swelling is the result of an abnormal buildup of fluid within the soft tissue. It most often occurs at the ankle and calf region. Often it is caused by an underlying venous disease. There are other contributing factors causes as well such as congestive heart failure, blood clots, kidney issues, past injuries or certain medications. If this condition is left untreated, more severe conditions such as secondary lymphedema may occur. Early treatment of venous insufficiency may prevent or improve leg swelling concerns and needs to be addressed by a vein doctor. A physician specializing in vein treatment will look for venous insufficiency prior to addressing.