Why do most women with chlamydia have no symptoms?
Chlamydia is frequently silent because the bacteria can infect the cervix or urethra without triggering enough inflammation to cause noticeable discomfort. Most women with chlamydia have no symptoms at all. This is one reason chlamydia is the most commonly diagnosed bacterial STI in the UK: it spreads quietly between people who feel completely well.
The absence of symptoms does not mean the infection is mild or harmless. It can still be transmitted to partners and can still cause complications over time, which is why testing after a new partner or unprotected sex matters more than symptom-watching.
What symptoms can chlamydia cause in women?
When chlamydia does cause symptoms, they typically include unusual vaginal discharge, bleeding between periods or after sex, pain or a burning feeling when urinating, lower abdominal or pelvic pain, and pain during sex. None of these are unique to chlamydia, which is why a test rather than symptom-matching is the reliable way to find out.
A plain summary of the more common symptoms, how often they show up, and other conditions that cause the same signs.
None of these symptoms confirms chlamydia on their own, and their absence does not rule it out either. Testing is the only way to know for certain.
Can chlamydia affect fertility?
Left untreated, chlamydia can spread from the cervix into the womb and fallopian tubes and cause pelvic inflammatory disease (PID). PID is a serious infection of the reproductive organs, and around 1 in 10 women who develop it go on to have fertility problems from the scarring it can leave behind. Chlamydia can also increase the risk of ectopic pregnancy.
PID is treated with antibiotics, and testing and treating chlamydia early lowers the chance of it developing. If you have pelvic pain that persists after treatment, or keeps returning, a gynaecology review can look at the picture in more detail. An initial gynaecology consultation at Gynae Clinic Harley Street covers persistent pelvic pain.
Can chlamydia infect the throat or rectum?
Yes. Chlamydia can infect the throat after oral sex and the rectum after anal sex, and both are usually asymptomatic. A urine sample or vaginal swab only tests the genital site, so if you have had oral or anal sex, tell the clinician so the relevant site can be swabbed as well. Each site is tested separately because a genital result does not tell you whether the throat or rectum is also infected.
When should I test after sex?
A chlamydia test is reliable from 14 days after exposure. Testing earlier can produce a false negative because the bacteria have not yet reached detectable levels. If you have symptoms, test regardless of timing, since a positive result is still meaningful even before 14 days; a negative result taken early should be repeated once you reach the 14-day mark.
What does testing involve?
Testing is straightforward: a urine sample or a self-taken vaginal swab, both processed by PCR. You do not need an internal examination unless a clinician recommends one for another reason. If you have had oral or anal sex, a throat or rectal swab covers those sites.
Should any of the more general symptoms above be present, it is worth screening for other infections at the same time, since chlamydia and gonorrhoea commonly overlap and cause similar symptoms.
Does my partner need to be tested?
Yes. If you test positive for chlamydia, your current sexual partner (and any recent partners) should be tested and treated at the same time. Without this, you can be reinfected shortly after finishing your own treatment, and the cycle repeats. Partner testing does not need to happen in the same appointment or even at the same clinic. If your partner is male, our guide to chlamydia symptoms in men explains what he might notice.
How testing works at our Harley Street clinic
A chlamydia test costs £104, using a urine sample or a self-taken vaginal swab, with results in 3 days. Avoid urinating for 2 hours before the test for the most accurate result. If you would rather screen more broadly, our women's screening packages start at £250 for the Bronze Package (chlamydia, gonorrhoea, HIV and syphilis), or £375 for Silver, which adds Mycoplasma genitalium, Ureaplasma, Gardnerella and herpes I & II testing.
If you need an answer today, our same-day STI testing service includes a FAST Screen Simple panel (HIV, syphilis, chlamydia and gonorrhoea) for £350, with results in 6 hours. If you only need chlamydia and gonorrhoea, the FAST urine test for both is £124, also with results in 6 hours. Walk in seven days a week at 117a Harley Street; no GP referral is needed. Our guide to private STI testing in London explains how a confidential visit works.
Concerned about symptoms, or simply due for a check? Book a chlamydia test at 117a Harley Street: £104, results in 3 days.
References
- Chlamydia (NHS.uk condition page)
- Chlamydia: uncomplicated genital (NICE CKS)
- UK National Guideline for the Management of Genital Tract Infection with Chlamydia trachomatis (BASHH)
- Sexually transmitted infections and chlamydia screening in England: official statistics (UKHSA)
- Pelvic inflammatory disease (NHS.uk condition page)
