7 Main Causes of Blood in the Semen and What to Do

The blood in the semen before the age of 40, usually not a serious problem and, therefore, tends to disappear by itself after 2 or 3 days, without the need for treatment specific.

Already the appearance of blood in the semen after the age of 40 years may, in some cases, be a symptom of some more serious health problems, such as vesiculite or prostatitis, which need to be treated, being necessary to consult a urologist to identify the cause and start the appropriate treatment.

However, in any cases, if the sperm with blood often arise or if you take more than 3 days to disappear, it is recommended to go to a urologist to evaluate the need to begin some type of treatment to cure the problem or relieve the symptoms.

What may be blood in the semen

The most frequent causes of blood in semen are small bumps or inflammations in the male reproductive system, however, the bleeding can also arise due to the medical examinations, such as biopsy of prostate or more serious problems such as sexually transmitted diseases or cancer, for example.


1. Bumps in the genital region

Lesions in the genital region, such as cuts or blows, for example, are the most frequent cause of blood in the semen before the age of 40 and, typically, the man does not remember having happened. Therefore, it is important to note the intimate area to look for some cutting or other signs of trauma such as swelling, redness or haematoma.

  • What to do:normally, in these cases, the blood in the semen disappears after about 3 days and, therefore, it is not necessary any kind of specific treatment.

2. Use of anticoagulants

The use of some medicines, especially blood thinners, such as Warfarin or Aspirin, increase the risk of bleeding of the small blood vessels that lie in the path of the semen, which may cause the output of blood during ejaculation.

  • What to do:if the bleeding lasts more than 3 days to disappear is advised to consult a urologist and take all the medications you are taking to assess the need of changing any medicine.

3. Have made a biopsy of the prostate

The biopsy of the prostate is a type of invasive procedure that uses a needle to remove a sample of the body and, therefore, it is very often the emergence of bleeding in the semen and in the urine due to the trauma caused by the needle and by breaking some blood vessels.

  • What to do:the bleeding is normal if the examination has been done up to 4 weeks before the appearance of blood in the semen, being only recommended to consult the urologist if there is excessive bleeding, or fever above 38 ºC.

4. Inflammation of the prostate or testicles

The inflammations which may appear on the male reproductive system, mainly in the prostate or testicles, are one of the most common causes of blood in semen and, therefore, it is important to be aware of other symptoms such as fever, pain in the intimate area or swelling of the testicles.

  • What to do:if there is any suspicion of inflammation it is advised to consult a urologist to identify the type of inflammation and start the appropriate treatment, which can be done with antibiotics, anti-inflammatory drugs or painkillers, for example.

5. Benign prostatic hyperplasia

Prostatic hyperplasia, also known as enlarged prostate is a common problem in men after 50 years and one of the main causes of blood in semen in older men. Typically, this type of problem is accompanied by other symptoms such as pain when urinating, difficulty passing urine or urge to urinate sudden.

  • What to do:it is recommended to make examination of the prostate after 50 years of age, which may include making the digital rectal examination and blood tests to identify if there is any problem with the prostate and start the appropriate treatment.

6. Sexually transmitted diseases

Although rare, the presence of blood in the semen, can be a sign of development of sexually transmitted diseases, such as genital herpes, chlamydia or gonorrhoea, especially when it comes after having sexual intercourse without a condom, for example.

  • What to do:if you have been intimate contact without a condom or appear other symptoms such as discharge coming out of penis, pain when urinating or fever, it is advised to consult a urologist to do blood tests for the various sexually transmitted diseases.

7. Cancer

Cancer is one of the causes of the most rare blood in the semen, however, this hypothesis must always be investigated, especially after the 40 years because the cancer of the prostate, bladder, or testicles can, in some cases, cause the emergence of blood in the semen.

  • What to do:you should consult a urologist if there is any suspicion of cancer or to make the routine screening after the age of 40 years to allow the identification of the risk of having cancer, starting treatment indicated by the physician, if necessary.

7 Main Causes of Blood in the Semen and What to Do 1

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