The idea of having an STI can be scary, and dealing with the symptoms can be even more stressful. However, some sexually active people who test negative for STIs may still experience certain symptoms.
In this blog, we’ll explore the different kinds of genital discharge that can appear even with a negative STI test, and provide guidance on how to manage these concerns.
Unusual discharge from the genitals might be a sign of an STI. Book a test at a sexual health clinic near you today.
Before delving into the details of STD-related discharge, it’s essential to understand what normal genital discharge is.
Vaginal discharge is a common occurrence for people with vaginas. It varies in colour, consistency, and amount throughout the menstrual cycle.
For most women, normal genital discharge is:
Your vaginal discharge can vary during pregnancy, after sexual contact, or if you’re on birth control. It can often be slippery and wet between your periods.
If you notice a significant change in your normal genital discharge, it might be a sign that something’s off with your health.
Men don’t experience the same kind of genital discharge that women do. They tend to only experience penile discharge during certain situations.
Unusual discharge from the penis or vagina is a common symptom of several sexually transmitted diseases. It’s primarily a symptom of bacterial or protozoal infections that infect the urethra and urinary tract. These infections include:
Chlamydia is a bacterial infection that often presents no symptoms. When symptoms do appear, they may include a mucus-like discharge from the penis or vagina, often accompanied by pain during urination or sex.
Gonorrhoea, also known as “the clap”, can cause a thick, yellow or green discharge from the penis or vagina. This discharge may be smelly and is often accompanied by genital pain or a burning sensation when urinating.
Mycoplasma genitalium is a lesser-known but increasingly common STI. It may cause unusual vaginal discharge in women and urethral discharge in men, often alongside pelvic pain or discomfort during urination.
Trichomonas or “Trich”, is a parasitic infection that can lead to a frothy vaginal discharge with a fishy odour in women. Men may experience a thin white discharge from the penis, along with irritation or soreness.
Ureaplasma is a naturally occurring bacterium that can become problematic when it overgrows. It may cause a watery vaginal discharge with an unpleasant odour in women, and urethral discharge in men, often with inflammation or pain.
Unusual discharge can also be caused by other infections.
Urinary tract infections (UTIs) happen when bacteria infect parts of the urinary system, including the bladder, kidneys, urethra, and prostate.
Common symptoms include pain when urinating, frequent urges to go, and a white-ish discharge.
Yeast infections are another common culprit for abnormal vaginal discharge. This type of infection often results in thick, white, and clumpy discharge, accompanied by itching and irritation.
If you’ve tested positive and been treated for an STI, it’s possible to have some symptoms persist even after testing negative for the infection.
This can happen because of:
Your body’s response to the infection can cause inflammation and an increase in discharge, which might take some time to return to normal.
As the body recovers, it might expel remnants of the infection or medication used to treat it, resulting in discharge.
STIs can disrupt the balance of the vaginal microbiome. Even after treatment, it may take time for the microbiome to fully restore itself.
PID is a serious complication of untreated or inadequately treated STIs. It can lead to persistent pelvic pain, unusual discharge, and other symptoms. If you’re concerned about PID, consult Better2Know or your healthcare professional immediately for evaluation and treatment.
Most STIs can be cured. Understanding what is normal and when to seek medical advice is essential in managing post-STI concerns.
If you think you’ve been exposed to an STI, or would like to get more comprehensive STI test results, you should get tested with Better2Know for timely treatment. Our conveniently located STI clinics can offer blood test and urine tests for any STI you may be worried about. You can even book a consultation with a private doctor if you feel you need a physical examination.
Have you had an STD test negative but still have discharge? Don’t leave your sexual health to chance.
This article first appeared on 15/12/2023. Last updated 05/09/2025.