What are the symptoms of chlamydia?
Most people with chlamydia have no symptoms. Signs can include unusual discharge, burning when peeing, unexpected bleeding, lower tummy pain or testicular pain.
Updated: 2026-10-09 • Published: 2026-10-09 • 4 sources cited
Chlamydia is a sexually transmitted infection (STI) that is often passed on through sex without a condom. According to the NHS, most people with chlamydia do not notice any symptoms, making testing important even when nothing feels unusual.
When chlamydia causes symptoms, they may affect the genitals or other areas exposed to vaginal fluid or semen. NHS guidance explains that symptoms can begin from one week to several months after infection. The infection is treated with antibiotics, but untreated chlamydia can cause serious complications.
This guide explains the symptoms of chlamydia, when they may appear, how testing works, treatment, and when to seek medical advice. The NHS says a sexual health clinic or GP can help if you suspect chlamydia, while some pharmacies provide testing kits and sexual health advice.
What are the symptoms of chlamydia in women?
According to the NHS, chlamydia can cause vaginal discharge that is not normal for you, bleeding after sex or between periods, a burning feeling when you pee, and pain in your lower tummy. These symptoms can affect anyone with a vagina.
The NHS emphasises that most people with chlamydia have no symptoms. This means that not noticing unusual discharge, bleeding or discomfort does not establish whether you have the infection. You can be tested for chlamydia even when you feel well and have no symptoms.
Chlamydia can also lead to pelvic inflammatory disease (PID), an infection affecting the womb, fallopian tubes and ovaries. NHS guidance lists lower tummy or pelvic pain, unusual vaginal discharge, bleeding between periods and pain deep inside during sex among possible PID symptoms. Suspected PID needs urgent medical advice.
What are the symptoms of chlamydia in men?
The NHS lists white, cloudy or watery discharge from the tip of the penis as a possible symptom of chlamydia. Other signs include a burning feeling when peeing, burning or itching around the penis and testicles, and pain or swelling in the testicles.
These symptoms can affect anyone with a penis. However, NHS guidance says most people with chlamydia do not have symptoms at all. The absence of discharge, burning or testicular discomfort therefore does not mean that an infection is absent. Testing can identify chlamydia without symptoms.
The NHS warns that untreated chlamydia can cause infection in the testicles. If you notice symptoms or think you may have been exposed, a sexual health clinic or GP can assess you. Chlamydia is treated with antibiotics, and earlier treatment makes complications easier to treat.
Can chlamydia affect your throat, eyes or bottom?
Yes. NHS guidance explains that chlamydia can affect other parts of the body that come into contact with semen or vaginal fluid. Possible symptoms include a sore throat, redness, pain or discharge from the eyes, and pain, bleeding or discharge from the bottom.
The NHS says chlamydia can spread through vaginal, oral or anal sex without a condom. It can also spread when vaginal fluid or semen gets onto sex toys or hands. These routes explain why the infection is not limited to the penis or vagina.
If your throat, eyes or bottom are affected, a doctor or nurse may take a swab from the relevant area. NHS guidance also says you may be offered tests for other STIs. Tell the healthcare professional about your symptoms so they can explain which samples are needed.
How long after sex do chlamydia symptoms start?
According to the NHS, chlamydia symptoms can start from one week to several months after infection. There is therefore no single time when symptoms will appear. Importantly, most people with chlamydia do not experience symptoms, so waiting for signs is not a reliable way to identify infection.
NHS guidance on sexually transmitted infections explains that some STIs can take up to seven weeks after unprotected sex to show up on a test. If you have no symptoms, the NHS advises waiting seven weeks before STI testing. A clinic can advise if you have concerns.
You do not need to wait for symptoms before seeking advice. The NHS recommends visiting a sexual health clinic or GP if you or a partner think you might have chlamydia, or if you have had sex without a condom. Testing is possible without symptoms.
How do you get tested for chlamydia?
The NHS says chlamydia testing may involve giving a urine sample or having a swab taken from the penis or vagina. You may be able to take the swab yourself. If your bottom, throat or eyes are affected, a healthcare professional may also take samples from these areas.
During an appointment, a doctor or nurse may ask about your symptoms and sexual partners. They may need to examine your penis or vagina. The NHS says you can request a chaperone, such as another healthcare professional or someone you know, to be present during the examination.
If you have no symptoms but want a test, NHS guidance says you can use a home self-test kit and send it to a laboratory. Sexual health clinics and some pharmacies may provide free kits. People under 25 may also be eligible for free chlamydia home testing.
How is chlamydia treated and what happens if it is not treated?
Chlamydia is treated with antibiotics. According to the NHS, treatment may involve a single dose or tablets taken for seven to fourteen days. Sometimes treatment begins before test results return. Complete the prescribed treatment and follow the healthcare professional's instructions about any further testing.
NHS guidance says to avoid vaginal, anal and oral sex until you and your partner, if you have one, have finished treatment and tests show you no longer have chlamydia. Current and recent sexual partners need testing, and sexual health clinics can help contact them.
Untreated chlamydia can cause pelvic inflammatory disease, infection in the testicles and reactive arthritis. The NHS says PID can lead to infertility or ectopic pregnancy. During pregnancy, untreated chlamydia can pass to a baby during birth and cause an eye or lung infection.
What you can do if you think you might have chlamydia
- 1Arrange a chlamydia test through a sexual health clinic or GP if you think you may have the infection.
- 2Use a home self-test kit sent to a laboratory if you have no symptoms but want testing.
- 3Tell your current and recent sexual partners if you have chlamydia so they can get tested.
- 4Avoid vaginal, anal and oral sex until you and your partner have completed treatment and tests show the infection has gone.
- 5Finish the full course of treatment prescribed for you.
- 6Have another test after treatment if advised, including a test four weeks after treatment if you are pregnant.
The NHS recommends using condoms during vaginal or anal sex and appropriate barriers during oral sex. It also advises testing once a year or when you have a new sexual partner.
A sexual health clinic can help contact sexual partners or contact them on your behalf. NHS guidance says clinics can usually notify partners without naming you, making it possible to arrange testing and treatment.
Common Misconceptions & Clinical Facts
"If you have no symptoms, you cannot have chlamydia."
The NHS says most people with chlamydia have no symptoms, and testing is possible even when you feel well.
"Chlamydia can only spread through penetrative vaginal sex."
NHS guidance says chlamydia can spread through vaginal, oral and anal sex without a condom, as well as through semen or vaginal fluid on sex toys or hands.
"Having a burning feeling when peeing proves you have chlamydia."
The NHS lists burning when peeing among possible symptoms of sexually transmitted infections, but says the only way to know for sure whether you have an STI is to get tested.
Practical context and next steps
According to the NHS, people without chlamydia symptoms can collect a home self-test sample and send it to a laboratory. Free kits may be available through sexual health clinics or some pharmacies, while other pharmacies sell them. If you are under 25, you may also be eligible for a free chlamydia home test kit.
NHS guidance warns that untreated chlamydia can lead to pelvic inflammatory disease, infection in the testicles and reactive arthritis, which causes joint pain. PID can affect fertility and increase the risk of ectopic pregnancy. Chlamydia can also pass to a baby during birth, potentially causing an eye infection or pneumonia, according to the NHS.
A decision checklist for this topic
Before acting on anything you read here, run through this short check.
Most people with chlamydia have no symptoms, according to the NHS.
Possible symptoms include unusual discharge and a burning feeling when peeing.
Bleeding after sex or between periods and lower tummy pain are possible symptoms in people with a vagina.
Penile discharge, genital burning or itching, and painful or swollen testicles are possible symptoms in people with a penis.
Chlamydia can affect the throat, eyes and bottom as well as the genitals.
The NHS recommends chlamydia testing once a year or when you have a new sexual partner.
When to get professional or urgent help
•Go to a sexual health clinic or see a GP if you or a sexual partner think you may have chlamydia or have had sex without a condom.
•Ask a sexual health clinic or pharmacy about a home self-test kit if you have no symptoms but want testing.
•See a GP or attend a sexual health clinic if you are pregnant or planning pregnancy and think you might have chlamydia.
•Seek an urgent GP appointment or NHS 111 advice for suspected pelvic inflammatory disease, and call 999 or go to an accident and emergency department for severe or worsening pelvic pain or other emergency symptoms listed by the NHS.
Safety note: This article provides general sexual health education, not an individual diagnosis or treatment plan. NHS guidance and advice from a qualified healthcare professional should take priority when deciding about testing, treatment or symptoms. If you suspect pelvic inflammatory disease, follow the NHS guidance on urgent and emergency care.
The NHS provides sexual health services offering STI testing, treatment and advice. You can contact a sexual health clinic, speak with a GP or ask a pharmacy about suitable testing services. You can also be tested when you have no symptoms.
Questions & Clear Answers
Yes. The NHS says most people with chlamydia have no symptoms. You can still be tested when you feel well. Testing is important because the absence of discharge, pain, burning or bleeding does not establish whether you have the infection.
According to the NHS, chlamydia can cause white, cloudy or watery discharge from the tip of the penis. In people with a vagina, it can cause discharge that is not normal for them. Testing is needed to establish whether chlamydia is present.
Yes. The NHS lists lower tummy pain as a possible chlamydia symptom in people with a vagina. Untreated chlamydia can also cause pelvic inflammatory disease, which may involve pelvic or lower tummy pain. NHS guidance recommends urgent medical advice if you suspect PID.
The NHS says chlamydia is treated with antibiotics, and you may need another test to check that the infection has gone. If you are pregnant, you will be tested again four weeks after treatment. Complete treatment and follow NHS guidance about avoiding sex until the required conditions are met.
The NHS says most people with chlamydia have no symptoms. Possible signs include unusual discharge, burning when peeing, unexpected vaginal bleeding, lower tummy pain, testicular discomfort and symptoms affecting the throat, eyes or bottom. Testing is the way to establish whether an STI is present. Chlamydia is treated with antibiotics, and getting treatment sooner makes complications easier to treat.
References & Sources
Openlywell articles are compiled with reference to published guidance from international public-health authorities, professional colleges and peer-reviewed literature.
- [1]NHS — Chlamydia, page last reviewed 24 October 2024
- [2]NHS — Pelvic inflammatory disease (PID), page last reviewed 17 December 2025
- [3]NHS — Sexually transmitted infections (STIs), page last reviewed 13 May 2024
- [4]NHS — Sexual health services (nhs.uk service finder)
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