<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing ankle swelling lately. I dont know what it is, but my ankle is visibly larger than the other one.  <response>: Based on your symptoms, it is possible that you are experiencing venous insufficiency. This is a condition where the veins in your legs have difficulty pumping blood back to your heart, resulting in swelling in your ankles and legs. 