Conversation: The conversation between human and AI assistant.
[|Human|] Hi, I had a bad fall about 1.5 years ago. I hurt my knee and part of my lower leg. I am retaining water in my leg now. The doctor said he does not know why. The part that is constantly in pain after walking is just behind my kneecap. It feels like the muscle doing down to my leg at the back. I slipped and fell on my knee bending it backwards. I
[|AI|]  Headfirst off I would get Doppler venous flow studies of the leg to check for a deep venous thrombosus--a clot in a deep vein. If that was clear, I would get an MRI of the knee to look for a Bakers' cyst in the posterior area of the knee. Then, if that wasn't the problem, I would get a lymphangiogram of the leg to look for lymphedema that could be causing the swelling. Ask your doctor for these studies