Can Oral Sex Without Protection Lead to STDs? Risks and Symptoms - Urology

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Unprotected oral sex?


At the beginning of February, my girlfriend performed oral sex without a condom, but she had a sore in her mouth.
A few days later, I noticed two or three red bumps on my genital area.
When I visited the doctor, some said it was balanitis, while others suggested it might be herpes.
However, my girlfriend and I have never had any sexually transmitted infections (STIs) before, and we have not engaged in any sexual intercourse, only oral sex.
Is it possible to contract an STI in this situation? (A few days after the bumps appeared, I went to the hospital for testing, and the results were normal, indicating no STIs.)

Hi, 20~29 year old female. Ask Date: 2021/04/03

Dr. Du Shixi reply Urology


Hello: This response is for reference only and is not a substitute for a medical examination.
Balanitis is a simple skin infection that can be caused by various types of bacteria.
Maintaining cleanliness and dryness is usually sufficient for recovery.
The herpes virus primarily consists of two types, with initial infections potentially being asymptomatic or very mild (childhood infections are also possible).
The virus resides in nerve ganglia and can reactivate under certain conditions (such as a decrease in immune function or for unknown reasons).
During this time, it is contagious (though there is a slight chance of transmission from skin that does not have visible lesions).
If lesions appear, it is possible that the male (or female) has either reactivated their own virus or contracted it from someone else.
Diagnosis requires clinical evaluation or sample testing, or herpes virus testing for reference, which can be quite complex.
Wishing you good health.
You may refer to the following links for more information: https://hlm.tzuchi.com.tw/dermat/index.php?option=com_content&view=article&id=1108%3A2013-03-26-02-21-38&catid=175%3A2011-07-22-06-55-25&Itemid=461&lang=zh https://kb.commonhealth.com.tw/library/244.html https://health.udn.com/health/story/5963/3992062 http://www.shutien.org.tw/dr_doc_detail.aspx?bookid=552

Reply Date: 2021/04/03

More Info


Engaging in oral sex without protection does carry some risk of transmitting sexually transmitted diseases (STDs), even if both partners believe they are free of infections. The risk is particularly heightened if there are any open sores or bleeding in the mouth, as these can serve as entry points for pathogens. In your case, since your girlfriend had a sore in her mouth during oral sex, this could potentially increase the risk of transmission, depending on the presence of any infections.

When it comes to STDs, different infections have varying modes of transmission and symptoms. For instance, herpes simplex virus (HSV) can be transmitted through oral sex if one partner has an active outbreak, even if they are asymptomatic at the time of the encounter. Other infections, such as gonorrhea and chlamydia, can also be transmitted through oral sex, although the risk is generally lower compared to vaginal or anal intercourse.

In your situation, you mentioned that your girlfriend performed oral sex on you without protection, and she had a sore in her mouth. You also noted that you developed red bumps on your genital area a few days later. While these symptoms could be indicative of an infection, they are not definitive proof of an STD. Conditions such as folliculitis, irritation, or even a benign skin condition could also cause similar symptoms.

It's important to understand that even if both partners have not previously been diagnosed with STDs, it does not guarantee that they are free of infections. Many STDs can be asymptomatic, meaning individuals may carry the infection without showing any signs or symptoms. Regular testing is crucial, especially if engaging in sexual activities that pose a risk of transmission.

You mentioned that you went to the doctor and tested negative for STDs. This is reassuring, but it’s also essential to consider the timing of the tests. Some STDs have a window period, which is the time between potential exposure to the infection and the point when the test can accurately detect it. For example, HIV can take several weeks to months to become detectable, while other infections like gonorrhea and chlamydia may show up sooner.

If you are experiencing anxiety related to your sexual health, it may be beneficial to speak with a healthcare professional who can provide guidance and support. They can help you understand your risks, the importance of regular testing, and how to maintain sexual health moving forward.

In summary, while the risk of contracting an STD from oral sex is lower than from other forms of sexual activity, it is not negligible, especially in the presence of open sores or bleeding. Regular testing and open communication with partners about sexual health are key components of reducing the risk of STDs. If you have ongoing concerns or symptoms, seeking medical advice is always the best course of action.

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