Cause

Benign prostatic hyperplasia (BPH) is probably a normal part of the aging process in men, caused by changes in hormone balance and cell-growth factors. Genetics may also play a role. This is especially true for severe BPH requiring surgery in men younger than 60.

Men who are older than 50 have a higher chance of developing BPH. But why some men have more severe symptoms than others is not known.