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What are the Symptoms of Chlamydia?

Writer: Trusti TeamTrusti Team

Updated: Feb 25

Chlamydia. Although it may sound like an exotic flower, there’s nothing pretty about this infection. Chlamydia is one of the most common sexually transmitted infections (STIs), and it’s sneaky—so sneaky, in fact, that many people don’t even realize they have it. Let’s break down the symptoms, who’s at risk, and why early detection is important.


Chlamydia 101: A Quick Overview

Chlamydia is caused by the bacterium Chlamydia trachomatis. According to the Centers for Disease Control and Prevention (CDC), chlamydia is the most frequently reported bacterial STI in Ontario, with around 40,000 new cases being reported every year. Public Health Ontario echoes similar trends, with chlamydia being the most commonly diagnosed STI in the province.


Why is it so common? Because it’s often silent. Around 70-90% of infected women and about 50% of infected men show no symptoms.


Symptoms of Chlamydia: When It’s Not So Silent

For the lucky few who do show symptoms (lucky being a relative term here), the signs can vary depending on anatomy and the site of infection.


In People with Vaginas:

  • Unusual Vaginal Discharge: If your discharge looks different from the usual, it might be a sign.

  • Pain During Urination: This is one of the more common signs, and is always worth looking into.

  • Pain During Sex: If intimacy is suddenly uncomfortable, you should get yourself checked out.

  • Abdominal or Pelvic Pain: This could signal that the infection is spreading to the upper reproductive tract.

  • Bleeding Between Periods or After Sex: Unexplained bleeding is always worth a conversation with your healthcare provider.


In People with Penises:

  • Discharge from the Penis: This could range from clear to cloudy.

  • Pain During Urination: If it hurts, get it checked out.

  • Testicular Pain or Swelling: This one’s rare but it can happen. Stay aware.


Rectal Symptoms:

For those who engage in anal sex, chlamydia can also infect the rectum. Symptoms may include:

  • Rectal pain

  • Discharge

  • Bleeding


Sometimes, rectal chlamydia is asymptomatic, proving yet again how stealthy this infection can be.


Oral Symptoms:

Though less common, chlamydia can infect the throat if transmitted via oral sex. Symptoms may mimic a sore throat but are usually mild.


Why Symptoms (or Lack Thereof) Matter

The tricky thing about chlamydia is that it can quietly wreak havoc if untreated. According to the Public Health Agency of Canada (PHAC), untreated chlamydia can lead to pelvic inflammatory disease (PID) in people with vaginas, which can cause chronic pain and infertility. In people with penises, it can lead to inflammation of the epididymis, potentially affecting fertility. It’s truly a cruel infection, only showing itself when it decides to wreak havoc on your reproductive system.


Who’s at Risk?

While anyone who is sexually active can get chlamydia, some groups are more at risk:

  • Young Adults: The CDC notes that 15-24-year-olds account for more than 50% of all chlamydia cases.

  • Multiple Partners: The more partners you have, the higher your risk.

  • Inconsistent Condom Use: Condoms are your best defense against STIs, but they need to be used correctly and consistently.


Testing: The Only Way to Know for Sure

Given that so many people with chlamydia are asymptomatic, regular testing is crucial. Public Health Ontario recommends annual STI screenings for sexually active individuals under 25, or for anyone with new or multiple partners. These can be done using multiple methods, but we are working on offering an at-home testing kit for chlamydia that guarantees fast results and personal privacy. For now, (we’re sorry), going into a clinic or speaking with your primary health provider are your best options for testing.


Prevention: The Best Practice

Prevention is key in reducing the spread of STIs. Here are some steps to minimize risk:

  1. Use Protection: Consistent use of condoms and dental dams significantly reduces the risk of STI transmission.

  2. Vaccinate: Vaccines for HPV and hepatitis B offer excellent protection.

  3. Communicate: Open and honest discussions with sexual partners about STI testing and sexual health is healthy for relationships, and helps to create mutual responsibility.

  4. Get Tested: Regular testing ensures early detection and treatment. If you’re sexually active with multiple partners, get tested every three months.


We know how annoying wearing condoms are. We also don’t care. You’ve gotta use them.


The Takeaway

Chlamydia is common, often silent, and entirely preventable with the right precautions. Knowing the symptoms, getting tested regularly, and having open conversations with your partner(s) can make a world of difference. And remember, sexual health isn’t just about avoiding infections—it’s about feeling confident, informed, and in control of your choices.


So, whether you’re ninja-dodging infections or just brushing up on your STI knowledge, take a proactive approach. Your future self will thank you.


Want to do an STI test from home? Subscribe to Trusti’s newsletter to find out when tests for these conditions are available in your location.

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