Can Deep Kissing Transmit STDs? Risks and Safety - Urology

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Deep kissing, where the tongue enters the partner's mouth, can potentially transmit sexually transmitted infections (STIs) if one partner is infected. However, if both partners have no open sores or cuts in their mouths, the risk of transmission is significantly lower. It is still important to be aware that some STIs, such as herpes or cytomegalovirus, can be transmitted through saliva?


Hello doctor, I had unprotected oral sex with a sex worker for less than a minute on April 7, and immediately afterward, I wiped with a wet tissue.
A month later, I went to a private health testing center, and the RT-PCR results were normal.
I also had a full STD screening (HIV, syphilis, herpes, chlamydia, gonorrhea), and all results were normal.
Then, on May 12 and May 17, I had sexual encounters with sex workers.
On May 12, I only had protected oral sex, and on May 17, I had protected oral sex and kissing, where my tongue went into the other person's mouth, which should be considered deep kissing.
After kissing, I spat out saliva several times, and afterward, I rinsed my mouth with water and brushed my teeth (with toothpaste), and I also washed my genitals with water.
1.
What is the likelihood of contracting an STD through kissing in this manner? I had no wounds in my mouth, and the other person also said she had none.
2.
It seems there are no reported cases of STD transmission through deep kissing worldwide? I found no results online.
3.
The Red Ribbon Foundation states that deep kissing does not transmit HIV, but the Ministry of Health and Welfare's Centers for Disease Control says deep kissing is of moderate risk.
What is the actual risk of infection? If both parties have no wounds in their mouths, is there still a risk?
4.
I have eczema, and her tongue touched and kissed areas with eczema.
Is there a risk of contracting an STD in this case?
5.
Do my test results indicate that I am not infected? The testing center said I could be tested after 28 days, and they have thousands of RT-PCR test cases with no instances of results changing from negative to positive.

Yu, 10~19 year old female. Ask Date: 2018/05/17

Dr. Du Shixi reply Urology


Hello: Deep kissing is considered a moderate risk.
You can refer to https://www.cdc.gov.tw/professional/info.aspx?treeid=beac9c103df952c4&nowtreeid=3a380faf26d530d6&tid=F9393FF1D6981B851.
1) It's difficult to determine the presence of oral wounds; we can only say there are no major injuries.
2) Since deep kissing and sexual activity may occur simultaneously, if there is an infection, it is likely attributed to sexual activity.
3) I base this on data from the Centers for Disease Control, as this information is updated simultaneously by health authorities worldwide and should not differ.
4) The transmission of eczema depends on skin conditions, individual health status, and immunity, making it hard to predict.
5) I recommend getting tested at a hospital, and it is essential to have tests done 3-6 months after engaging in unprotected sexual activity.

Reply Date: 2018/05/17

More Info


Deep kissing, often considered a more intimate form of physical affection, can indeed carry risks for the transmission of sexually transmitted diseases (STDs), although the level of risk varies depending on several factors. In your case, you've engaged in various sexual activities, including deep kissing, and have expressed concerns about potential STD transmission. Let's break down your questions and concerns.

1. Risk of STD Transmission through Deep Kissing: The risk of transmitting STDs through deep kissing is generally considered to be moderate. While saliva is not a primary vehicle for the transmission of most STDs, certain infections can be transmitted through oral secretions if there are open sores or bleeding gums in either partner's mouth. In your situation, since both you and your partner reported having no open wounds in your mouths, the risk is lower, but not entirely absent. Infections like herpes simplex virus (HSV) can be transmitted even when no visible sores are present, as the virus can shed asymptomatically.

2. Cases of STD Transmission through Deep Kissing: While there are limited documented cases of STDs being transmitted through deep kissing, it is important to note that most studies focus on more common routes of transmission, such as vaginal or anal intercourse. However, the Centers for Disease Control and Prevention (CDC) classifies deep kissing as a moderate risk activity, particularly if there are any cuts or sores in the mouth. Therefore, while the likelihood is low, it is not zero.

3. Conflicting Information on Risk Levels: The discrepancy between organizations regarding the risk of deep kissing can be attributed to varying definitions of "risk" and the contexts in which these activities occur. The Red Ribbon Foundation may emphasize that deep kissing is not a common route for HIV transmission, while health departments may categorize it as a moderate risk due to the potential for other STDs. If both partners are healthy and free of STDs, the risk is significantly reduced.

4. Impact of Eczema and Skin Conditions: If you have eczema or any skin condition, and your partner's saliva comes into contact with affected areas, there is a potential risk for transmission of infections, particularly if the skin is broken or inflamed. However, the likelihood of contracting an STD from such contact is still relatively low, especially if both partners are asymptomatic.

5. Testing and Results: Your recent testing results showing no infections after engaging in sexual activities are reassuring. Most STDs have a window period during which they may not be detectable, so it is generally recommended to retest after a period of 3 to 6 months following potential exposure, especially if symptoms develop or if you have further concerns. The fact that your RT-PCR results were normal and that you underwent a comprehensive STD screening is a positive indicator of your sexual health.

In conclusion, while deep kissing does carry some risk for STD transmission, particularly if there are any sores or cuts present, the overall risk is considered moderate, especially if both partners are asymptomatic and healthy. It is always advisable to maintain open communication with sexual partners about health status, practice safe sex, and undergo regular testing to ensure sexual health. If you have ongoing symptoms or concerns, consulting with a healthcare provider for further evaluation and guidance is recommended.

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