American Sexual
Health Association

STIs and Oral Sex

Can someone be infected with a sexually transmitted infection (STI) from oral sex? Yes. Many STIs, including chlamydia, gonorrhea, and syphilis, can be spread through oral sex. However, the chances of giving or getting STIs during oral sex can be lowered by using a condom or dental dam.

By definition, oral sex is when someone puts his or her lips, mouth or tongue on a man’s penis, a woman’s genitals (including the clitoris, vulva, and vaginal opening), or the anus of another person. There are different terms used to describe types of oral sex:

  • Fellatio is the technical term used to describe oral contact with the penis.
  • Cunnilingus describes oral contact with the clitoris, vulva or vaginal opening.
  • Anilingus (sometimes called “rimming”) refers to oral contact with the anus.

Oral sex is common among sexually active adults. As with other types of sexual activity, oral sex can transmit STIs. It may be possible to get some STIs in the mouth or throat from giving oral sex to a partner with a genital or anal/rectal infection, particularly from giving fellatio.

It also may be possible to get certain STIs on the penis, and possibly the vagina, anus or rectum, from receiving oral sex from a partner with a mouth or throat infection. It’s possible to have an STI in more than one area, for example in the throat and the genitals.

STIs Transmitted Through Oral Sex

Preventing STIs

The chances of giving or getting STIs during oral sex can be lowered by using a condom, dental dam or other barrier method each and every time a person has oral sex:

For fellatio (mouth-to-penis contact):

  • Cover the penis with a non-lubricated latex condom.
  • Use plastic (polyurethane) condoms, if a partner is allergic to latex.

For cunnilingus (mouth-to-vagina contact) and anilingus (mouth to anus contact):

  • Use a dental dam, or
  • Cut open a condom to make a square, and put it between the mouth and the partner’s vagina or anus.

Sexually active individuals should get tested regularly for STIs and HIV, and talk to all partner(s) about STIs. Anyone who thinks that he/she might have an STI should stop having sex and visit a doctor or clinic to get tested. There are free and low-cost options for testing available. It is important to talk openly with a health care provider about any activities that might put a person at risk for an STI, including oral sex.

More to Explore

A couple kissing

Can I Get an STI from Kissing?

You can get STIs from kissing, but most experts would tell you that kissing—even passionate kissing with tongue—is a pretty safe sexual behavior.

An older couple kissing

STIs Are Not Just for the Young

STIs aren’t about age, they’re about sexual behavior. Older people are having sex, and they need to be thinking about sexually transmitted infections.

Talking about sexual pleasure on the podcast

Talking about Sexual Pleasure on the Podcast

Featuring interviews with medical professionals and experts in the field of sexuality, ASHA’s Sex+Health podcast aims to offer information and resources to with the goal of helping people take charge of their sexual health.

A person holds a pill in one hand and a glass of water in the other

Supreme Court Leaves Mifepristone Rules Alone—For Now

The U.S. Supreme Court overruled a lower court decision that would have made mifepristone harder to get even in states where abortion remains legal. But the decision doesn’t mean the court is softening its stance on abortion rights.