Is it normal for semen to have a foul, fishy odor?

Aug 02, 2021 Source: Cainiu Health
Disease description:

Yesterday, I had intercourse with my boyfriend, and after he ejaculated inside me, I noticed an unusually strong, fishy odor—something I’d never experienced before. We both pay close attention to personal hygiene. I’m wondering: Is it normal for semen to have such a foul, fishy smell?

Doctor's answer (1)
Dr. Deng Tao
Hello, under normal circumstances, semen has a mild fishy odor. A stronger, unpleasant fishy smell is also considered normal and generally not a cause for concern. Occasionally detecting a fishy or foul odor from semen is normal and typically nothing to worry about. Although healthy semen usually has only a faint fishy scent, a more pungent or unpleasant fishy odor can still be normal. If semen remains on underwear or outside the body for an extended period, the proteins in it may undergo denaturation, which can produce a stronger fishy or foul odor. We hope this information is helpful. Wishing you good health and happiness!