Chlamydia is a very common STI caused by bacteria. It spreads through vaginal discharge and semen. Symptoms, like painful urination or unusual discharge, often appear 1-3 weeks after exposure, but many people have no symptoms at all. Testing involves a simple urine sample for men and a vaginal swab for women. Chlamydia is curable with antibiotics. Untreated, it can lead to serious health problems.
Quick Overview
Symptoms
Men: painful urination, discharge, testicular pain, red spots. Women: changed discharge, bleeding after sex/between periods, abdominal pain, painful sex. Anal sex can cause rectal discomfort/discharge. Often no symptoms.
Causes
Caused by Chlamydia trachomatis via vaginal discharge/semen. Risk: unprotected sex with infected person, multiple partners, shared unclean sex toys. Not from kissing, hugging, towels, cutlery, toilet seats. Condoms help.
Diagnosis
Chlamydia testing uses a high vaginal swab (women) or urine sample (men). Oral/rectal swabs possible. PCR technology used. Test if symptomatic, exposed, pregnant, new/multiple partners. Confidential.
Treatment
Easily treated with an antibiotic course. Complete full course. Avoid sex for 7 days post-treatment. If symptoms persist, a 4-week test of cure may be needed. Partners also need testing/treatment.
Prognosis
Easily treated, usually no long-term problems. Untreated in women: can lead to PID (infertility, pain), treatable. Men: rarely epididymitis, treatable. Can cause reactive arthritis.
FAQs
Chlamydia symptoms in men:
- Pain when passing urine.
- Discomfort and irritation in the urethra.
- Unusual discharge from the tip of the penis or back passage.
- Pain and/or swelling in the testicles.
- ‘Wetness’ at the penile tip.
- Less commonly, red spots on the glans (head) of penis.
- Mucoid, slimy, or blood-stained discharge from the back passage, as well as anorectal discomfort (for those who have anal sex).
Chlamydia symptoms in women:
- A change in discharge that is abnormal for you.
- Bleeding after sex.
- Bleeding between periods, or spotting.
- Abdominal pain.
- Painful sex.
- Mucoid, slimy, or blood-stained discharge from the back passage, as well as anorectal discomfort (for those who have anal sex).
In some cases, women with bacterial vaginosis may have an underlying sexually transmitted infection like Chlamydia, Gonorrhea, or Trichomoniasis. The most effective approach is to treat the underlying infection to prevent the recurrence of bacterial vaginosis. By addressing the underlying STI, the chances of successfully managing bacterial vaginosis are improved.
Symptoms usually begin to appear within 1 to 3 weeks post exposure. You are able to test earlier than 14 days if you are experiencing symptoms. However, it is very common to not experience any symptoms at all.
Many individuals infected with Chlamydia may not experience any symptoms and may remain asymptomatic.
Only about 10% of males and 5-30% of females develop symptoms.
In some cases, symptoms may be so mild that they go unnoticed.
Although Chlamydia is primarily a genital infection, it can infect other mucous membranes in the body including the back of throat (pharyngitis). Most patients with a throat infection due to chlamydia will have no symptoms, but those who do may complain of discomfort and pain in the throat.
Chlamydia infection in the rectum can be seen in those who have receptive anal sex. Most patients with anal or rectal chlamydia may experience symptoms such as irritation or itching in the rectum, while others may remain asymptomatic. Those with a more pronounced infection may exhibit mucoid, slimy, or blood-stained discharge from the anal passage.
The symptoms of Chlamydia, Gonorrhoea, and Mycoplasma genitalium are very similar. It is possible to have more than one STI at a time.
It is important that different infections are diagnosed correctly and treated appropriately for the complete resolution of your symptoms.
Chlamydia is caused by the bacterium known as Chlamydia trachomatis, and is transmitted through vaginal discharge and semen.
You are more likely to get Chlamydia if:
- You engage in unprotected oral, vaginal or anal sex with someone who is infected.
- You have multiple sexual partners.
- You share sex toys which have not been cleaned properly, or do not have a condom on them.
- You are in very close contact with your partner’s genitals and their vaginal or seminal fluids (semen).
You cannot get Chlamydia through kissing, hugging, sharing towels, cutlery, or from a toilet seat.
Chlamydia is primarily transmitted through infected vaginal and semen fluids. By engaging in protected oral, vaginal, and anal sex, you can greatly reduce your risk of contracting Chlamydia. Using condoms during sexual activities helps minimise the chances of transmission.
However, some creams and vaginal pessaries, such as thrush treatment, can make condoms less effective.
It is not possible to tell who gave you Chlamydia.
You can prevent the transmission of Chlamydia by:
- Wearing a condom during oral, vaginal and anal sex.
- Not sharing sex toys that are unclean and do not have a condom on them.
- Get regularly tested if you have multiple partners, or get tested with your new partner before engaging in sexual intercourse.
- If your partner has tested positive for Chlamydia, avoid sexual intercourse until 7 days after treatment.
Chlamydia is easily treated and most individuals clear the infection without any lasting complications.
However, if left untreated in women, Chlamydia infections can spread to the uterus, ovaries, and fallopian tubes. This causes a condition known as pelvic inflammatory disease (PID).
If PID is left untreated, it can lead to further complications such as infertility, chronic pelvic pain, and an increased risk of ectopic pregnancy. PID can be easily treated with a course of antibiotics.
In men, Chlamydia can spread to the testicles causing inflammation. This is known as epididymitis and is rare. The inflammation can be treated with a course of antibiotics.
Chlamydia can also cause sexually active reactive arthritis (SARA). SARA causes your joints, eyes and urethra to become inflamed, and can occur in both men and women, but more commonly in men. SARA usually resolves within a few months.
If you are pregnant and have an untreated Chlamydia infection, it is possible to pass the infection onto your baby. Your baby can develop conjunctivitis, or pneumonia.
You may also experience complications such as having a premature birth or your baby being born with a low birth weight.
No.
Chlamydia is easily transmitted and this is why it is important to get tested regularly if you are experiencing symptoms, have multiple partners, or change your sexual partners frequently.
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Page last reviewed by Mrs. Magda Nowacka on 23 November 2023 for general guidance only. It is not intended to replace the advice of your clinician.