Last year I fell at work and I bruised my right knee badly. It all got better except for now, a year later, I have a lump (looks like a hernia) on the right side of my knee. It's soft, doesn't hurt, but swells a little after exercise. I had it checked after my accident by my doctor, and he didn't seem to think it was anything. Any advice so I don't hurt it while exercising? Should I wear a knee brace or wrap it while exercising? Thanks