<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been having a lot of pelvic pain and theres this bump on my skin thats been bothering me. Do you know what it could be?  <response>: It sounds like you may have osteochondroma. The pelvic pain and skin lesion are common symptoms of this disease. Well need to do some imaging tests to confirm the diagnosis. 