Hi, I have a small patch, about 2cm long of skin on my arm, which is 1/3 between my elbow and wrist that is very painful. It generally aches a bit, but to touch it is very sensitive and painful. There doesn't appear to be any bruising, and I don't recall hitting it in any way. I think I can feel a small say 1.5 cm narrow lump or raised something under the skin.