A few weeks ago my son had a lump under his right nipple and was extremely painful to touch. After visiting the doctors, on the first visit was told it may be joggers nipple but on the second visit that it was possibly an abscess and prescribed anti-biotics. Over a period of a couple of weeks appeared to have improved and produced no further pain. However, my son now has a similar lump on his other nipple, is red and extremely painful when touched. He also has lumps/infalmation under his arm pit. After being examined by a doctor today, he was told there was nothing wrong with him and that he simply has mastitis and is caused by hormonal problems. He is 19 years old and is still worried about the problem as the visit to the doctors has not reasurred him. Any comment on this would be welcomed. What are the possibilities of the Doctors diagnosis being wrong and would you advise a second opinion. Many thanks.