large lump appears under my skin in my scrotum. Starts of the size of a 5 pence piece then gets larger and larger. There is a lot of pain and eventually it will get to a point were it bursts and releases yellow/green puss and then bleeds. I clean and dress it and this eases the pain but it will continue to recur. Can anyone tell me the cause of this. I also have small recurring spots/boils on my inside leg.