How common is bleeding between periods in chlamydia?

Chlamydia is a sexually transmitted infection that can irritate the cervix. This irritation may lead to bleeding between periods or after sex, sometimes with unusual discharge, pain when urinating, or lower abdominal pain. Symptoms can be mild or absent, so a person cannot tell from bleeding alone whether chlamydia is present. Untreated infection can move higher into the reproductive organs and cause pelvic inflammatory disease.

Arrange a sexual-health or medical appointment for testing if you have unexplained spotting, a new partner, a partner with an infection, or symptoms after sex. Testing may use a urine sample or a swab, depending on the site being checked. Avoid sex until you have received advice about treatment and partners. If the test is positive, follow the prescribed treatment and partner-notification advice so reinfection is less likely.

Seek prompt care for pelvic pain, fever, pain during sex, vomiting, or feeling very unwell, because these can occur when infection has spread. Get urgent help for severe pain, fainting, heavy bleeding, or a possible pregnancy with pain or bleeding. Do not wait for symptoms to become severe before arranging testing.

Which tests should I have, and which body sites need testing? Could another infection or cause explain the bleeding? Do current or recent partners need testing? When is it safe to have sex again, and is follow-up testing needed?