On my right arm there is a small hard, painful to touch bump growing under my skin near the elbow. I've had it since January and it appears to have grown. On top of that the pain has increased in that area. Could this possibly be damage to a nerve that has swollen? Or is it a sign of a tumor? No color changes have occurred in the area where the small bump is, but the skin is now puffy and the ball is noticeable. As opposed to the first time I noticed the bump. It was not noticeable to the eye but to the touch yes. Please Let me know what your thoughts are on this! Thank you for your time and consideration!