For men under 40 years old with no associated symptoms and no risk factors for underlying medical conditions, blood in semen usually goes away on its own. But for men 40 years old and older, blood in semen can be a sign of cancer, blood clotting disorders, etc.

Normal semen is off-white in color. If the semen turns pink or red, it is suspected that there is blood in the semen. This condition is sometimes harmless and disappears without treatment. However, it can also be a warning sign of many other underlying diseases.

Semen is a milky white fluid secreted from the urethra during ejaculation. Semen consists of mobile sperm and nutrient-rich fluids. The purpose of semen is to help transport sperm and stimulate fertilization.