What can cause ankle pain and knee pain on the right side of my body?

Get diagnosed first: There are a number of things that can cause swelling in the ankles and feet. This is a very nonspecific symptom. I recommend that someone swelling in these areas should be seen by orthopedic foot and ankle surgeon for a definitive diagnosis so that appropriate treatment can be started. You can find one in your area at: www.Orthodoc.Aaos.Org/foot ankle.