Ive had this bump on my chest specifically on my sternum and for some while and it changes in size very often. It been there for about a year, and it is hard and a good size larger than a pea at its most noticeable point. Sometimes it feels as if nothing is there and my rib cage is normal. If any of you can describe what this might be it would help me out a lot thanks. I dont think its cancer. Perhaps a lymph node problem?
(20 M; Physically fit)