Sunday I noticed a small hard knott that was kind of behind/on the side of my knee. It was a little painful to touch, but not a big deal. I didn't think of it again until I was in the shower a few days later and noticed that I had one on my lower left leg. It was painful to touch, a little bigger. I went to compare it to the one behind my knee and I couldn't find it. Today, it looks a little red, maybe more pink. And it is now causing my constant, though mild, pain. Could this be a cyst? I also have been experiencing what I thought to be muscle or nerve pain in the same leg, going from the buttox area to the back of my knee. Could this be related somehow? I am overweight, but I'm a busy Mom of 4 children and would hardly say my life is sedentary!