So yesterday I checked my penis while cleaning it and notice a dark brown patch on it and worried that it may be cancerous. It's about 3 mm wide. Should I be worried.

Question

During sexual arousal, the penis can take on a reddish, almost purple color because of the increased blood flow to its blood vessels and glands. But there are other potentially serious reasons why your penis might turn a different color. The causes of penile discoloration can range from a zipper-inflicted bruise to penile cancer, a rare condition that represents less than 1 percenttrusted source of cancers in u.s. Men. In some cases, a change in penis color is a sign of a sexually transmitted disease (std) or a noncontagious, harmless skin condition. Penile discoloration is almost always a cause for a medical evaluation. It may end up being temporary and relatively benign, but you shouldn?t make that diagnosis on your own.

M S Haque · Accepted Answer

During sexual arousal, the penis can take on a reddish, almost purple color because of the increased blood flow to its blood vessels and glands. But there are other potentially serious reasons why your penis might turn a different color. The causes of penile discoloration can range from a zipper-inflicted bruise to penile cancer, a rare condition that represents less than 1 percenttrusted source of cancers in u.s. Men. In some cases, a change in penis color is a sign of a sexually transmitted disease (std) or a noncontagious, harmless skin condition. Penile discoloration is almost always a cause for a medical evaluation. It may end up being temporary and relatively benign, but you shouldn?t make that diagnosis on your own.