Chlamydia is a sexually transmitted infection (STI) caused by the bacterium Chlamydia trachomatis. It is one of the most commonly reported STIs worldwide, particularly among individuals under age 25. Chlamydia often presents no noticeable symptoms, making routine screening essential for early detection and prevention of complications.

Overview of Chlamydia
Chlamydia is primarily spread through unprotected sexual contact, including vaginal, anal, and oral sex. Because it is often asymptomatic, many individuals may not realize they are infected and can unknowingly transmit the infection to others.
Without treatment, chlamydia can lead to serious reproductive health problems, such as pelvic inflammatory disease (PID) in women and epididymitis in men, both of which may affect fertility.
Symptoms of Chlamydia
Many cases of chlamydia show no symptoms, but when symptoms do occur, they may include:
- Unusual genital discharge (cloudy or yellow)
- Burning or pain during urination
- Lower abdominal or pelvic pain
- Painful intercourse
- Bleeding between menstrual periods
- In men: testicular pain or swelling
Chlamydia: Causes and Risk Factors
Chlamydia is caused by the bacterium Chlamydia trachomatis, and its spread is associated with:
- Unprotected sexual activity
- Multiple sexual partners
- Infrequent STI testing
- History of other STIs
- Being under age 25, which is a demographic at higher risk
When to See a Doctor for Chlamydia?
You should seek medical care if you:
- Experience unusual genital discharge, bleeding, or abdominal pain
- Have had unprotected sex with a new or multiple partners
- Experience emergency symptoms such as fainting, chest pain, or confusion
Regular STI screening is strongly recommended, even in the absence of symptoms.
Related Terms
- Urinary Tract Infection
- Dizziness
- Chlamydia trachomatis
- Pelvic Inflammatory Disease
- Epididymitis
