LGV treatment is a long course of antibiotics: doxycycline taken by mouth twice a day for three weeks CDC STI Guidelines. That extended length sets it apart from the short course used for ordinary chlamydia. Finishing the full course matters even after symptoms fade, and sexual partners usually need treating too so the infection isn't passed back and forth.
with the right treatment
testing, not symptoms, decides
| Item | Value |
|---|---|
| Curable? | yes — with the right treatment |
| Tested by | NAAT / lab |
| If you may have it | get tested — testing, not symptoms, decides |
What LGV actually is
LGV stands for lymphogranuloma venereum, an aggressive cousin of regular chlamydia. Both are caused by the same bacterium, Chlamydia trachomatis, but LGV comes from specific strains — the L1, L2, and L3 serovars — that behave very differently from the serovars behind everyday genital chlamydia. Rather than staying confined to the surface of the genital or rectal lining, the LGV strains invade deeper tissue and travel into the lymphatic system, the network of vessels and nodes that drains fluid and fights infection. That invasion produces far more severe inflammation and can scar tissue if left alone.
To sort out how this differs from a standard diagnosis, the practical contrast is covered in lgv vs regular chlamydia: same bacterium, different strains, different course of treatment.
Symptoms — and the silent reality
LGV shows up in a couple of distinct patterns depending on where the infection takes hold, and some people have only mild signs early on before things progress.
Rectal infection (proctocolitis)
The most common presentation today is proctocolitis — inflammation of the rectum and lower colon from a rectal infection. People notice mucoid or bloody rectal discharge, anal pain, constipation, fever, or tenesmus, the frustrating constant urge to pass stool even when there's nothing to pass. This picture has been reported in outbreaks among men who have sex with men, often alongside HIV. Because the symptoms overlap with inflammatory bowel disease and other rectal infections, LGV is easy to miss unless a clinician is thinking about it.
Groin lymph node swelling
The other classic pattern is tender, usually one-sided swelling of the lymph nodes in the groin — the inguinal or femoral nodes. Left untreated, these can progress to buboes: fluctuant, pus-filled swellings that may rupture through the skin. This is the more common picture among heterosexual patients, and often the symptom that finally sends someone to a clinic. A fuller breakdown lives in lgv symptoms.
Early LGV can be quiet or mistaken for something minor, so test after a possible exposure rather than waiting to feel sick.
How LGV spreads
LGV passes through anal, vaginal, or oral sex, the same routes as other chlamydia. There's no extra mode of transmission; it travels with intimate contact. The rectal form clusters in people who have receptive anal sex, and a frank conversation about exposure sites helps a clinician test the right place.
How LGV is tested
Diagnosis rests on clinical suspicion combined with a Chlamydia trachomatis NAAT — a nucleic acid amplification test — taken from the symptomatic site, such as the rectum, while other causes are ruled out. The NAAT detects chlamydial DNA; specialized testing can then confirm it's an LGV strain rather than ordinary chlamydia. In practice a clinician will swab where you have symptoms, not just collect urine, because a rectal infection won't show up in a urine cup.
The sampling itself is straightforward: a urine cup, a self-collected or clinician-collected swab, or a quick exam, with results usually back in a few days. You can do this free or low-cost at health departments, Planned Parenthood, and Title X clinics. If you're unsure how soon a test will pick up an infection, read up on when to test after exposure, and when you're ready you can get tested. To weigh your options on turnaround and price, you can also compare testing providers.
LGV treatment: the 21-day doxycycline course
The recommended treatment is doxycycline 100 mg by mouth twice a day for 21 days. That three-week length is the single most important thing to understand about LGV care, far longer than the short course used for uncomplicated genital chlamydia, because the bacteria have invaded lymphatic tissue and need sustained exposure to be cleared. Stopping early because you feel better is the most common mistake, and it risks the infection persisting and the tissue scarring.
A few practical points make the course easier to finish. Take the pills with food and plenty of water, and avoid lying down right after a dose, since doxycycline can irritate the esophagus. Buboes sometimes need to be drained or aspirated by a clinician rather than allowed to rupture on their own. And ask whether your recent partners need treating; if they're not addressed, the infection can bounce back and forth.
| Feature | LGV | Ordinary genital chlamydia |
|---|---|---|
| Bacteria | C. trachomatis serovars L1, L2, L3 | Other C. trachomatis serovars |
| Tissue affected | Invades lymphatic system; deeper inflammation | Stays on genital/rectal surface |
| Typical signs | Proctocolitis; tender groin nodes/buboes | Often none; mild discharge or burning |
| Treatment | Doxycycline twice daily for 21 days | Shorter doxycycline course |
What happens if LGV goes untreated
Untreated LGV doesn't simply linger; it damages tissue. Possible complications include:
- Chronic proctocolitis with strictures (scarred, narrowed segments of the rectum or colon that can obstruct passage and cause ongoing pain).
- Fistulas (abnormal tunnels that form between the bowel and skin or other organs, leaking discharge through openings that shouldn't exist).
- Buboes that rupture and leave draining sinuses or chronic scarring in the groin.
- Lymphatic blockage that can lead to genital lymphedema — long-term swelling of the genitals because drainage is permanently impaired.
- Easier transmission of HIV, since the open inflammation and tissue breakdown give the virus an entry point.
Completing the full course promptly prevents most of this, so diagnosis and the 21 days matter a great deal.
Preventing LGV
The same steps that prevent other STIs apply here. Condoms used every time lower the risk, routine testing catches what's silent before it does damage, and treating partners stops the back-and-forth cycle. None of these are exotic. They're the ordinary, reliable tools, and they work.
When to see a clinician
See a clinician if you have rectal pain, bloody or mucky discharge, a constant urge to pass stool, or a tender lump in the groin, especially after anal sex or a possible exposure. Don't wait for a swelling to burst or for symptoms to escalate. This diagnosis is common and entirely treatable; clinics handle it daily. Getting seen early means a course of pills instead of managing scar tissue later.