Gonorrhea spreads through vaginal, anal, or oral sex without a condom with someone who has the infection. The chance of catching it from a single unprotected sexual encounter is estimated at 20% to 50%, making it one of the more easily transmitted sexually transmitted infections. A pregnant person can also pass it to their baby during childbirth.
Sexual Contact Is the Primary Route
The bacterium that causes gonorrhea thrives in warm, moist mucous membranes: the urethra, cervix, rectum, and throat. Any unprotected sexual contact that brings these surfaces together can transmit the infection. That includes vaginal intercourse, anal intercourse, and oral sex (both giving and receiving). The bacteria pass through direct contact with infected secretions, not through casual touch, saliva, or shared drinks.
You don’t need to have penetrative sex to be at risk. Oral sex is a common and underrecognized route, particularly for throat infections. Sharing sex toys without cleaning them between uses can also transfer the bacteria from one person to another.
Why Many People Spread It Without Knowing
One of the biggest reasons gonorrhea spreads so efficiently is that many infected people have no symptoms at all. About half of women with gonorrhea are asymptomatic, meaning they feel completely fine and have no reason to suspect an infection. Most men with urethral gonorrhea do develop symptoms (around 96%), but infections in the throat and rectum are a different story. Nearly all pharyngeal and rectal infections in men who have sex with men are asymptomatic.
When symptoms do appear, they typically show up about two weeks after exposure, though they can sometimes take months. That gap between infection and symptoms creates a window where someone can unknowingly pass gonorrhea to partners. This is why routine STI screening matters, especially if you have new or multiple sexual partners.
What Symptoms Look Like When They Appear
In men, the most common sign is a burning sensation during urination and a white, yellow, or green discharge from the penis. Testicular pain or swelling can also occur, though it’s less common. These symptoms tend to be noticeable enough that most men seek care within a few days.
In women, symptoms are easier to miss or mistake for something else. They can include increased vaginal discharge, painful urination, and bleeding between periods. Because these overlap with common conditions like urinary tract infections or yeast infections, gonorrhea in women often goes undiagnosed without testing.
Rectal infections may cause discharge, itching, soreness, or bleeding, but again, many produce no symptoms. Throat infections rarely cause symptoms beyond an occasional sore throat, and most people with pharyngeal gonorrhea never notice anything unusual.
You Can Spread It to Your Own Eyes
Gonorrhea doesn’t just pass between people. You can transfer the bacteria from your own genitals to your eyes by touching infected secretions and then touching your face. This is called auto-inoculation, and it can also happen through contaminated towels or clothing. Gonococcal eye infection is serious. Left untreated, it can damage the eye and potentially cause blindness.
Transmission During Childbirth
A pregnant person with an untreated gonorrhea infection can pass the bacteria to their baby during vaginal delivery. The newborn’s eyes are especially vulnerable as they move through the infected birth canal. The most severe outcome is a condition called ophthalmia neonatorum, which can perforate the eye and cause blindness if untreated. In rare cases, the infection can also spread to the baby’s bloodstream, causing joint infections or meningitis. This is one reason prenatal STI screening is standard practice.
What Doesn’t Transmit Gonorrhea
The gonorrhea bacterium is fragile outside the human body. It cannot survive long on dry surfaces, which means there is virtually zero chance of catching gonorrhea from a toilet seat, doorknob, swimming pool, or shared utensils. Hugging, handshaking, coughing, and sneezing do not spread it either. The bacterium requires direct contact with the specific mucous membranes it infects.
How Common It Is
Gonorrhea remains one of the most frequently reported infections in the United States. In 2024, there were over 543,000 reported cases, though the actual number is likely higher given how many infections go undiagnosed. Men accounted for roughly 63% of reported cases. Rates have been declining for three consecutive years, with a 10% drop from 2023 to 2024, but the infection is still widespread enough that anyone who is sexually active faces some level of risk.
Reducing Your Risk
Condoms, when used consistently and correctly, significantly reduce the chance of transmission during vaginal, anal, and oral sex. Dental dams offer a barrier option for oral sex as well. Getting tested regularly, particularly if you have new partners, helps catch asymptomatic infections before they spread. If you’re diagnosed, all recent sexual partners need to be notified and tested so the chain of transmission doesn’t continue.
Gonorrhea is curable with antibiotics, but reinfection is common because having it once doesn’t make you immune. Each new exposure carries the same 20% to 50% per-act transmission risk as the first.