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Symptom guide

Blood in semen

Find out about possible causes of blood in semen and when to get medical help.

About this information

This NHS content is written for people in England. Services, contact routes and treatment arrangements may differ in other countries.

What blood in semen looks like

Blood in your semen can be:

  • bright red when the bleeding has occurred recently
  • brown or reddish-brown when the bleeding is older

Sometimes there may be small lumps (clots) in the blood.

Depending on the cause, you may also have other symptoms like:

  • blood in your pee
  • pain when peeing or ejaculating
  • peeing more often than usual
  • pain in the area between your anus (bottom) and scrotum (the skin that covers your testicles)
  • pain in the abdomen, pelvis or scrotum

Causes of blood in semen

Most of the time it's not obvious what causes blood in semen and it goes away on its own.

But it's important to get it checked to make sure it's nothing serious.

Common causes of blood in semen include:

Rarely, blood in semen can be a sign of cancer, such as prostate cancer.

See a GP if:

  • you have blood in your semen

A GP can check for common causes and refer you to a specialist for more tests if needed.

Treatment for blood in semen

Blood in semen does not usually need to be treated. It often goes away by itself in a few days or weeks.

If a cause can be found, this may need to be treated.

For example, a urinary tract infection (UTI) or sexually transmitted infection (STI) may be treated with antibiotics.

Blood in semen

Symptoms

Blood in semen

Causes

Blood in semen

Medical treatments

Blood in your semen can be red or brown. Sometimes you might also have other symptoms such as blood in your pee or pain when peeing.

Often it's not obvious what causes blood in semen. Causes can include a sexually transmitted infection, a recent procedure or an enlarged prostate.

Most of the time blood in semen goes away without treatment in a few weeks. Sometimes the cause may be treated, such as antibiotics for an infection.

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

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