Many people ignore swollen feet and ankles, but Dr. Johanna Youner, board-certified podiatric surgeon and a Fellow of the American College of Foot and Ankle Surgeons, cautions that it should not be dismissed. Yes, swelling can come with aging, but if the problem is consistent or severe, be sure to see your doctor. Also get to a doctor if one leg is swollen and the other is not. Unchecked swelling can cause skin to weaken and ulcerate. While swollen legs or feet in the evening likely are a result of being on your feet during the day, you should be wary of swelling in the morning—this could indicate a more serious circulatory problem.