Green vaginal discharge is almost always a sign of infection. Unlike the clear or white discharge that’s a normal part of vaginal health, a greenish tint signals that your immune system is actively fighting something off. The shade can range from faintly green-tinged to distinctly green, and even a slight green hue is worth paying attention to.
Why Discharge Turns Green
The green color comes from your white blood cells. When your body detects an infection, it sends a flood of these immune cells to the area. White blood cells contain an enzyme that was originally named “verdoperoxidase” because of its intense green pigment. It’s the same enzyme that gives pus its greenish color anywhere in the body. So when you see green in your discharge, you’re essentially seeing the visible evidence of your immune system working to clear an infection.
Most Common Causes
Trichomoniasis
Trichomoniasis is the infection most strongly associated with green discharge. It’s a sexually transmitted infection caused by a parasite, and it’s one of the most common curable STIs. The discharge tends to be thin, increased in volume, and often has a fishy smell. One of its hallmark features is a bubbly or frothy texture, which can help distinguish it from other infections. Colors range from yellowish to greenish to gray.
Many people with trichomoniasis also experience itching, burning, or irritation around the vulva, and discomfort during urination or sex. However, up to 70% of people with trichomoniasis don’t notice symptoms at all, so it’s possible to carry the infection without knowing.
Gonorrhea and Chlamydia
Both of these STIs can produce cloudy, yellow, or green vaginal discharge. Gonorrhea tends to cause thicker, cloudier discharge, sometimes with a bloody tinge, while chlamydia discharge is often more subtle. Both infections can also cause pain during urination, bleeding between periods, or pelvic discomfort. Like trichomoniasis, both can be present without obvious symptoms, which is why routine STI screening matters if you’re sexually active.
Bacterial Vaginosis
Bacterial vaginosis (BV) happens when the balance of bacteria in the vagina shifts, allowing certain types to overgrow. It’s the most common vaginal infection overall, but it more typically produces gray or white discharge with a strong fishy odor. That said, some people with BV notice a yellowish or greenish tint, especially when the infection is more advanced. BV isn’t sexually transmitted, though sexual activity can increase the risk of developing it.
Other Symptoms to Watch For
The green color alone is significant, but the full picture helps narrow down what’s going on. Pay attention to these details, because they’re exactly what a healthcare provider will ask about:
- Smell: A fishy odor points toward trichomoniasis or bacterial vaginosis. Gonorrhea and chlamydia are less likely to produce a strong smell.
- Texture: Frothy or bubbly discharge is a classic sign of trichomoniasis. Thick, cloudy discharge leans more toward gonorrhea.
- Itching or burning: Common with trichomoniasis and yeast infections. Less typical with BV, chlamydia, or gonorrhea.
- Pain during urination: Suggests gonorrhea, chlamydia, or trichomoniasis.
- Bleeding between periods: Can occur with gonorrhea or chlamydia if the infection has spread to the cervix.
Is Slightly Green Ever Normal?
Normal vaginal discharge falls in the clear-to-white range, sometimes with a slightly yellowish tint, especially when it dries on underwear. A healthy vagina maintains a pH between 3.8 and 4.5, and the discharge it produces reflects that balanced environment. Green doesn’t fall within the normal color spectrum. Even “a little green” suggests some degree of immune response or bacterial imbalance happening inside the vaginal canal.
That said, lighting and fabric color can play tricks. If you’re noticing the green tint only on certain underwear or only in certain lighting, look at the discharge against a white tissue or toilet paper instead. If it still looks green, it’s worth getting checked.
What Testing Looks Like
A provider will typically take a swab of the discharge, which feels similar to a Pap smear and takes just a few seconds. They may test for trichomoniasis, gonorrhea, chlamydia, and BV all at once. Some clinics offer rapid results for certain infections, while others send samples to a lab, with results back in a few days. If you’re not comfortable with an in-person visit, many providers now offer at-home STI test kits that you can mail back for processing.
How These Infections Are Treated
The good news is that every common cause of green discharge is treatable. Trichomoniasis is treated with a course of oral antibiotics, typically taken twice daily for seven days. Bacterial vaginosis follows a similar antibiotic approach. Gonorrhea and chlamydia each have their own targeted treatments, usually involving a short course of antibiotics as well. Symptoms often start improving within a few days of beginning treatment, though you should finish the full course even if you feel better.
If you’re treated for an STI, any recent sexual partners need treatment too. Otherwise, you can pass the infection back and forth. Most providers recommend avoiding sex until both you and your partner have completed treatment.
Green Discharge During Pregnancy
Pregnancy increases vaginal discharge overall, and it’s normal for pregnant people to notice more fluid than usual. But green discharge during pregnancy carries extra urgency. Infections like trichomoniasis, gonorrhea, and chlamydia can increase the risk of preterm labor and, in rare cases, infection of the amniotic sac. These complications are preventable with early treatment, so green-tinged discharge during pregnancy is something to bring up with your provider right away rather than waiting for your next scheduled visit.