Brown stuff in sperm

This page is intended to give you a better idea of the possible causes, but you should always see a GP for a diagnosis. Erik P. Castle, M. This content does not have an English version. Male infertility. A GP will try to determine whether the cause of the blood in your semen is likely to be serious or not. For example, if a man has prostatitis or a sexually transmitted infection, he may need to take antibiotics.