Lymphogranuloma venereum (LGV) is a sexually transmitted infection that is uncommon but treatable. This guide explains what LGV is, how it spreads, and the symptoms it can cause, such as genital sores, swollen lymph nodes, and rectal problems. You will also learn how LGV testing works, why it differs from a routine chlamydia test, and how treatment and prevention work. This information is general and does not replace advice from a qualified healthcare provider.
Key Takeaways
- LGV is a treatable STI caused by specific strains of Chlamydia trachomatis.
- It can cause a painless sore, swollen groin glands, or rectal pain and bleeding.
- Standard chlamydia tests may not confirm LGV without extra testing.
- A healthcare provider can prescribe antibiotics that clear the infection.
- Condoms and regular testing lower your risk of LGV and other STIs.
What lymphogranuloma venereum (LGV) is
Lymphogranuloma venereum (LGV) is a sexually transmitted infection caused by specific strains of the bacterium Chlamydia trachomatis. Those strains behave differently from the ones behind routine chlamydia. Instead of staying mostly on the surface of the genitals or rectum, LGV moves into lymph tissue, the network of glands and vessels that helps your body fight infection. That is why LGV can cause swollen lymph nodes in the groin and, in some cases, lasting damage to the rectum. LGV is uncommon in the United States, but cases have increased in recent years among some groups, especially men who have sex with men. It is not a new or mysterious illness. It is a bacterial infection that responds to treatment, and most people recover well when they get care early. LGV is not the same as common chlamydia, even though both come from the same bacterium. That difference affects which test your provider orders and how long treatment lasts. The first signs are often easy to miss, so testing matters if you have symptoms or a known exposure.
LGV symptoms to watch for
- A small, painless bump or sore where the infection entered, often on the genitals or in the rectum
- Swollen, tender glands in the groin, sometimes only on one side
- Rectal pain, bleeding, discharge, or a constant feeling of needing a bowel movement
- Fever, chills, headache, or general muscle aches that last several days
- Symptoms that usually begin days to a few weeks after exposure
- No noticeable symptoms at all, which happens in many cases
How LGV spreads and who is at higher risk
LGV spreads through sexual contact, including vaginal, anal, and oral sex, when infected fluids or tissue touch a partner's mucous membranes. It passes more easily when the skin or lining is already irritated or inflamed by another infection. How STDs are transmitted explains the general routes. Some situations raise the risk. Condomless anal sex, especially receptive anal sex, is linked to most recent LGV cases. Having new or multiple partners, or living with HIV, also raises the chance of infection. Rectal LGV has been reported most often in men who have sex with men, but anyone who has anal or vaginal sex can get it. Condoms and other barrier methods lower the risk but do not remove it completely. Anal sex carries a higher risk of several infections, and LGV is one of them.
LGV testing and diagnosis
There is no routine screening test for LGV in a standard STD panel. A regular chlamydia test may come back positive, because LGV is a type of chlamydia, but confirming LGV usually takes extra testing. A healthcare provider will ask about your symptoms and recent sexual history, then may swab a sore, the rectum, or fluid from a swollen lymph node. Blood tests can also support the diagnosis. Timing matters. Testing too soon after exposure can miss an infection, so ask your provider when to test. How long after exposure to test and how STD testing works cover the basics. Results usually take a few days, depending on the lab. If waiting feels stressful, managing STD testing anxiety may help. If cost is a concern, free and low-cost testing options exist in most areas.
Stages of LGV at a glance
| Stage | What you may notice | Typical timing |
|---|---|---|
| Primary | A small painless bump or sore at the site of infection | Days to weeks after exposure |
| Secondary | Swollen groin glands, or rectal pain, bleeding, and discharge | Weeks after the sore appears |
| Late, if untreated | Scarring, abscesses, fistulas, or long-term swelling | Months to years later |
Treatment, recovery, and prevention
LGV is treated with antibiotics that a healthcare provider prescribes. The course is usually longer than for routine chlamydia, and it is important to finish all of it even if your symptoms improve. Do not stop early, and do not use leftover antibiotics from an earlier infection. If a lymph node is very swollen, your provider may drain it. Sex partners should be tested and treated too, even if they feel fine. Avoid sex until your provider says you are cleared, so the infection does not pass back and forth. Follow-up visits let your provider confirm the infection cleared and check any lasting symptoms. Prevention looks like other STI prevention. Use condoms or other barriers, talk with partners about testing, and get tested on a schedule that fits your life. How to prevent STDs goes into more detail. Medical decisions about testing and treatment belong with a qualified healthcare provider who knows your health history.
Frequently Asked Questions
Is LGV the same as chlamydia?
LGV is caused by certain strains of the same bacterium that causes chlamydia, but it behaves differently. It needs specific testing and a longer course of treatment than routine chlamydia.
Can LGV be cured?
Yes. A healthcare provider can prescribe antibiotics that clear the infection. Getting care early also lowers the chance of lasting damage to the rectum or lymph tissue.
How long does it take for LGV symptoms to appear?
A sore can show up days to a few weeks after exposure. Swollen lymph nodes or rectal symptoms often appear weeks later, and some people have no symptoms at all.
How do I get tested for LGV?
Ask a healthcare provider or clinic about LGV testing if you have symptoms or a known exposure. They may swab the rectum, a sore, or a swollen gland, and may order blood tests.