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Chlamydia

Professionally updated: January 15, 2026

Chlamydia is a sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis. It is a common infection that often shows no symptoms, which means that many people are unaware that they are infected. Fortunately, chlamydia is easy to diagnose and treat with antibiotics.

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Jakob Fraes
Specialist in General Medicine, Ph.D.
Read more about Chlamydia. Everything you should know.

Symptoms of chlamydia

It is essential to understand that chlamydia often occurs without visible symptoms. This can contribute to unknowingly spreading the infection, which highlights the importance of regular health check-ups and testing.

Symptoms in women

Women with chlamydia often experience mild or no symptoms. But when symptoms are present, they may include:

  • Painful urination: A burning or stinging sensation.
  • Lower abdominal pain: The pain may be constant or only occur during sex.
  • Abnormal vaginal discharge: Changes in color, smell, or consistency of the discharge.
  • Irregular menstruation or bleeding between periods.

If the infection spreads, women may also experience fever and lower back pain.

Symptoms in men

Men can also have chlamydia without showing symptoms. However, symptoms may include:

  • Discharge from the penis: Often clear, white, or yellow discharge.
  • Painful urination: A burning or stinging sensation.
  • Testicular pain and swelling: Especially in one testicle.

Asymptomatic course

Since chlamydia often presents without clear symptoms (asymptomatic), regular screening is essential, especially for those with multiple sexual partners or those who do not use protection during intercourse. Asymptomatic chlamydia can still lead to serious health complications, such as infertility, if left untreated.

If you recognise any of these symptoms or wish to be tested as a preventive measure, it is important to contact a healthcare provider or book an appointment for a chlamydia test. Our experienced doctors are ready to advise and guide you through the process, from testing to treatment and prevention.

Diagnosis of chlamydia

Getting an accurate diagnosis is essential for successful treatment and preventing further spread of chlamydia. Below you will find details on how chlamydia is diagnosed and why it is important to get tested regularly.

Diagnostic methods

There are primarily two methods for diagnosing chlamydia:

Urine test

This method requires a simple urine sample. The patient must provide a sample of their first morning urine, as this has the highest concentration of bacteria.

Cotton swab

Here, samples are taken from the areas that could potentially be infected. For women, this often involves a sample from the cervix, while men have a sample taken from the urethra. If you have had anal sex, the doctor can also take a sample from the rectum.
The test is quick and painless, and you will often get the result within a few days.

The importance of regular testing

Although chlamydia can be treated effectively with antibiotics, prevention and early detection are key to avoiding long-term health complications. This is especially true if:

  • You have a new sexual partner.
  • You have had unprotected sex with a partner whose sexual health you do not know.
  • You or your partner have had unprotected sex with other partners.
  • You are showing symptoms that could be related to chlamydia.

Regular screening is a responsible practice that protects both your own health and the health of your sexual partners. If you are sexually active, it is recommended that you get tested for chlamydia and other sexually transmitted infections regularly, especially if you do not use condoms consistently or have multiple partners.

Treatment of chlamydia

Being diagnosed with chlamydia can be worrying, but it is important to know that with timely and correct treatment, the infection can be completely cured without long-term effects. Below you will find a step-by-step guide to the treatment as well as important considerations during the course.

Step-by-step guide to treatment

Diagnosis confirmed

Once your chlamydia diagnosis is confirmed, your doctor will prescribe appropriate antibiotics to treat the infection.

Receiving antibiotics

You will typically receive a single dose of antibiotics, often as tablets. Follow your doctor's instructions carefully regarding dosage and use.

Period without sexual activity:

It is crucial that you abstain from having sex, including vaginal, anal, and oral sex, until the infection is cured, which typically takes about a week after starting treatment.

Follow-up test

The doctor may recommend a follow-up test to ensure the infection is completely cleared.

Inform Sexual Partners

It is of utmost importance that all your current and former sexual partners (within the last two months) are informed about your diagnosis so that they can also be tested and treated if necessary. This helps prevent further spread of the infection and possible complications in them.

Considerations and Precautions during Treatment

  • Follow the doctor's instructions carefully, and take the entire prescribed amount of antibiotics, even if you feel better sooner.
  • Avoid alcohol during treatment as it can interact with the medication and reduce its effectiveness.
  • Do not resume sexual activity until both you and your partner are fully treated and the infection is cured.

If you have any questions or concerns during your treatment, it is important to consult your doctor, who will be able to guide you through the process and provide advice and support. It is essential to be open and honest with the healthcare staff to ensure that you receive the best possible care and advice during your treatment.

Chlamydia prevention

Safe Sex

Practicing safe sex is the most effective method for preventing chlamydia:

  • Use of condoms and dental dams: Condoms, both male and female, and dental dams should be used consistently and correctly during all forms of sexual activity (vaginal, anal, and oral sex) to reduce the risk of transmission.
  • Lubrication: Use water-based or silicone-based lubricant during sex to avoid breakage or damage to the condom.

Regular STI Testing

  • Frequent health check-ups and tests: Undergo regular medical examinations and tests for chlamydia and other STIs, especially if you have multiple sexual partners or are in a new sexual relationship.
  • Follow-up after unprotected sex: If you have had unprotected sex, it is important to get a quick follow-up with an STI test.

Open and Honest Communication

  • Dialogue with partners: By talking openly with your sexual partners about sexual health, testing, and STI status, you can make informed decisions together about protection and prevention.
  • Inform partners of a positive test: If you test positive for chlamydia or another STI, you must inform your current and former partners so that they can be tested and treated if necessary.

Vaccination and Education

Although there is no vaccine against chlamydia, it is important to consider vaccination against the STIs for which there are vaccines, such as HPV and hepatitis B. Furthermore, education and awareness about sexual health and STIs is essential for effective prevention.

By taking these steps, you can actively contribute to your own sexual health and well-being, as well as protect your current and future partners from the risk of chlamydia and other sexually transmitted infections.

    Ready to book an appointment?

    Are you concerned about chlamydia or want to know more? Use our easy online booking system to book an appointment with one of our experienced doctors, who can advise, test, and treat chlamydia and other sexual health issues. Our team of health experts is here to help you take control of your sexual health today.

    Frequently asked questions about ECG

    Can I get infected with chlamydia without having intercourse?

    Chlamydia is primarily spread through sexual contact, which includes vaginal, anal, and oral sex. It is unlikely to be infected in other ways, as the bacterium does not survive long outside the human body.

    How do I know if I have chlamydia, if there are not always symptoms?

    Since chlamydia often occurs without symptoms (asymptomatic), regular testing is crucial, especially if you have multiple sexual partners or practice unprotected sex. If you experience symptoms such as abnormal discharge, pain when urinating, or pain during intercourse, you should seek medical attention and get tested as soon as possible.

    Can chlamydia be treated and cured?

    Yes, chlamydia can be effectively treated and cured with antibiotics. However, it is important to take the entire prescribed dose of medication, even if symptoms disappear before the course of medication is completed. Both partners should be treated simultaneously to prevent mutual infection.

    Can I get infected with chlamydia more than once?

    Yes, a previous chlamydia infection does not provide immunity, and you can therefore become infected again if you are exposed to the bacteria. This emphasizes the importance of continuing to practice safe sex, even after successful treatment for chlamydia.