Condition Basics
What is syphilis?
Syphilis is a sexually transmitted infection (STI) caused by a type of bacteria. If it's not treated by a doctor, it can get worse over time and cause serious health problems.
The infection can be active at times and not active at other times. When the infection is active, you have symptoms. When it's not active, you don't have symptoms. But you still have syphilis.
You can get syphilis without having sexual intercourse. Just being in close contact with an infected person's genitals, mouth, or rectum is enough to expose you to the infection. And it can also spread to the fetus of a person who has syphilis during pregnancy.
What causes it?
Syphilis is caused by a type of bacteria. The bacteria are usually spread through sexual contact. They most often enter the body through the tissues that line the throat, nose, rectum, penis, or vagina.
What are the symptoms?
One of the first signs of syphilis is an open sore that appears wherever the bacteria entered the body. As syphilis spreads, a person may get a skin rash and have other symptoms like a fever, swollen lymph nodes, and weight loss. Without treatment, syphilis may cause blindness and nerve and heart problems.
How is it diagnosed?
Your doctor will do a physical exam and ask about your symptoms and sexual history. You'll probably have one or more blood tests, especially if you don't have sores. If you do have sores, your doctor may take a sample of fluid from a sore for testing.
How is syphilis treated?
At any stage of infection, antibiotics work well to cure syphilis. They can't undo the damage already caused by late-stage syphilis. But they can help you avoid further problems from the infection. You and any sex partners that you may have exposed to the infection will need to be treated.
How can you prevent sexually transmitted infections (STIs)?
Here are some ways to help prevent STIs.
- Limit your sex partners. Sex with one partner who has sex only with you can reduce your risk of getting an STI.
- Talk with your partner or partners about STIs before you have sex. Find out if they are at risk for an STI. Remember that it's possible to have an STI and not know it.
- Wait to have sex with new partners until you've each been tested.
- Don't have sex if you have symptoms of an infection or if you are being treated for an STI.
- Use a condom every time you have sex. Condoms are the only form of birth control that also helps prevent STIs.
- If you had sex without a condom, ask your doctor if taking a preventive medicine is recommended. It may help prevent certain STIs if it's taken within 24 to 72 hours after unprotected sex.
- Don't share sex toys. But if you do share them, use a condom and clean the sex toys between each use.
Vaccines are available for some STIs, such as HPV. Ask your doctor for more information.