Blood in Urine After Unprotected Sex: Causes and Concerns

Hematuria after sexual intercourse?

Hello, Dr.
Hsu.
Recently, I had unprotected sexual intercourse with my girlfriend.
Both of us cleaned our genital areas before engaging in sexual activity.
However, the day after, my girlfriend experienced hematuria (blood in urine).
Are there any other possible causes for her hematuria? Could it be related to a sexually transmitted infection? Thank you for your clarification.

Ping, 30~39 year old female. Ask Date: 2018/11/29

Dr. Xu Wencang reply Urology

You can visit the outpatient clinic for an examination.

Reply Date: 2018/11/29

More Info

Understanding blood in urine after unprotected sex can be concerning and warrants a thorough examination of potential causes. Blood in urine, or hematuria, can arise from various factors, especially following sexual activity. In the context of unprotected sex, several possibilities should be considered.

Firstly, one of the most common causes of blood in urine after sexual intercourse is trauma or irritation to the urethra or bladder. During sex, especially if there is vigorous activity or if lubrication is insufficient, the delicate tissues of the urethra can become irritated or injured, leading to bleeding. This is particularly relevant if there was any roughness or if the female partner was not adequately aroused, which can lead to vaginal dryness and subsequent trauma.

Secondly, urinary tract infections (UTIs) are another frequent cause of hematuria. UTIs can occur due to the introduction of bacteria into the urinary tract during sexual activity. Symptoms of a UTI may include a burning sensation during urination, frequent urges to urinate, and lower abdominal discomfort. If your partner experiences these symptoms along with blood in the urine, it would be prudent to seek medical attention for a urinalysis and possible antibiotic treatment.

Sexually transmitted infections (STIs) should also be considered. Certain STIs, such as chlamydia and gonorrhea, can cause inflammation of the urethra (urethritis) and may lead to bleeding. If there is any suspicion of an STI, both partners should be tested and treated accordingly to prevent further complications and transmission.

Additionally, conditions such as cystitis (inflammation of the bladder) or vaginitis (inflammation of the vagina) can also lead to bleeding. Cystitis can be caused by infections or irritants, while vaginitis may result from infections, hormonal changes, or irritants like soaps and douches. Symptoms may include pain, itching, and unusual discharge.

In your situation, since the bleeding occurred after unprotected sex, it is essential to consider the possibility of STIs and UTIs seriously. It is advisable for your partner to consult a healthcare provider for a comprehensive evaluation. This may include a pelvic exam, urinalysis, and STI screening. Early diagnosis and treatment are crucial to prevent complications and ensure both partners' health.

Moreover, it is important to discuss safe sex practices. Using condoms not only reduces the risk of STIs but also minimizes the likelihood of trauma to the genital area during intercourse. Open communication with your partner about sexual health and practices can help in making informed decisions moving forward.

In summary, while there are several potential causes for blood in urine following unprotected sex, including trauma, infections, and STIs, it is vital to seek medical advice for an accurate diagnosis and appropriate treatment. Prompt attention to these symptoms can help alleviate concerns and promote better health outcomes for both partners.

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