with multiple tiny bumps and he just has one pencil eraser sized purple bump. Also, when I look up angiofibromas it does not say anything about them being located on the scrotum but on cheeks and nose
usually effects the oral mucosa, but in some cases it can be found on thighs and skin also. Excision and cuatery may be needed to remove them. Please get an evaluation done from a dermatologist.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.