You Can Still Get an STI From Oral Sex — Here's What to Know, According to MDs

Updated on 2/15/2024 at 4:15 PM

When you think about sexually transmitted infections (STIs), also known as sexually transmitted diseases (STDs), you're probably thinking about those transmitted during vaginal penetrative sex. But oral sex and STIs are super common too. The Centers For Disease Control and Prevention (CDC) estimates that one in five people in the United States has an STI. And the same STIs that you can catch via penetrative sex (like gonorrhea, genital herpes, syphilis, and HPV) can be caught through oral sex too. So just to clarify, if you've ever asked yourself, "Can you get an STD from oral sex?" the answer is yes. Basically, you need to have your guard up regarding STIs no matter the sex you're having. But to get you get you caught up on all necessary information on oral sex STDs, we chatted with sexual health experts about whether oral sex is safe when it comes to STIs, oral sex STD signs, and the best ways to protect yourself.

Is oral sex safe?

"Safe" is a relative term, but when it comes to STIs, experts say that oral sex is not safe. "There is no such thing as completely safe sex," says Mary Jane Minkin, MD, a clinical professor of obstetrics and gynecology and reproductive sciences at Yale School of Medicine. She jokes that the only way to have completely safe sex is to "use a vibrator," and even that poses its own set of risks.

Dr. Minkin points out that you can't get pregnant from oral sex, but you can have other unintended consequences. That leads us to the next question.

Can you get an STD from oral sex?

Yup, you definitely can. In fact, the CDC warns about this online, noting that you can get an STI in or on your mouth, throat, genitals, or rectum if you're exposed to an infected partner. It's not just one or two STIs you have to worry about, either: "Many sexually transmitted diseases can be spread through oral sex," says women's health expert Jennifer Wider, MD.

According to the CDC, you can get STIs from oral sex in the following ways:

In your mouth or throat after giving oral sex to a partner who has a genital, anal, or rectal STI
On your genitals and in your genital area after receiving oral sex from a partner with a mouth or throat infection
STIs like syphilis, gonorrhea, and intestinal infections can be transmitted through oral sex and then spread in the body
Oral sex involving the anus can transmit hepatitis A and B, along with intestinal parasites like giardia and bacteria like E. coli and shigella

There are also a few factors that can increase your risk of getting an STI from oral sex. Dr. Wider lists the following:

Sores in your mouth
Bleeding gums
Sores on your genitals
Mouth coming into contact with infected menstrual blood

Which STDs are you most at risk for during oral sex?

There are actually a lot. The CDC lists gonorrhea, chlamydia, herpes, HIV, HPV, and syphilis.

Here's a breakdown of STI symptoms to look out for, according to the CDC:

Chlamydia

You can initially get infected with chlamydia in the throat, genitals, urinary tract, or rectum, but most chlamydia infections in the throat have no symptoms. It's possible to have symptoms elsewhere, though, which can include:

Discharge from the vagina or penis
Burning feeling when peeing
Painful or swollen testicles
Rectal pain or discharge

Gonorrhea

Like chlamydia, most gonorrhea infections in the throat have no symptoms. But "you can get a sore throat from gonorrhea, just like a strep throat," says Dr. Minkin. Other symptoms, per the CDC, include:

Discharge from vagina or penis
Burning feeling when peeing
Painful or swollen testicles
Rectal pain or discharge

Syphilis

Syphilis can be present without symptoms, or it can lead to the following signs, the CDC says:

Painless ulcers or sores on the lips, mouth, throat, skin, or on or near the genitals or anus
Rash on the trunk, palms of hands, and/or soles of feet
Flu-like symptoms

Herpes

Like syphilis, it's possible to have no symptoms with herpes. However, the CDC says you may have the following:

Headache or fever when you're initially infected
Painful or itching sores at or near the area of infection

HPV

"HPV is a biggie" when it comes to STIs that can be transmitted via oral sex, Dr. Minkin says. In fact, this route of transmission is a growing cause of throat and mouth cancers, according to Harvard Health. With HPV, you may have no symptoms at all, or you might experience the following, per the CDC:

Warts in the throat that can cause changes in the voice, difficulty speaking, or shortness of breath
Genital or anal warts
Abnormal changes in cells of vagina, cervix, or anus found by clinical exams and tests
Vaginal, cervical, anal, penile, head, and neck cancers

HIV

People with HIV may have no symptoms for many years, the CDC says. However, flu-like symptoms are an initial sign of infection.

What are the best ways to protect yourself from STDs during oral sex?

It's important to "know your partner's history" and avoid having oral sex with them if they have an untreated STI, Dr. Wider says. Condoms can also be helpful in protection, Dr. Minkin says, along with dental dams, which go over the vaginal opening or anus like a big piece of plastic wrap. You can also cut open a condom to make a square and put it between your mouth and your partner's vagina or anus, the CDC says. Ultimately, experts stress the importance of prior proper planning. Oral sex can and should be enjoyable, but knowing your risk of getting an STI from oral sex and taking the proper precautions is the best course of action. And if you do think that you have an STI, be sure to get tested so that a healthcare provider can point you in the right direction when it comes to treatment.