Unusual genital discharge is one of the most common signs of an STD. The color, consistency, and smell of discharge can help identify the likely cause—but testing is the only way to know for sure.
Clear or White Discharge
Clear or milky white discharge can be normal, but if it is accompanied by itching, burning, or a foul odor, it may indicate chlamydia, gonorrhea, or trichomoniasis.
Yellow or Green Discharge
Yellow or green discharge is strongly associated with gonorrhea. It may be thick, pus-like, and have a strong odor. This symptom warrants immediate testing.
Gray or Frothy Discharge
Gray discharge with a fishy odor is characteristic of bacterial vaginosis (BV) or trichomoniasis. Both conditions are treatable but require different medications.
Bloody or Brown Discharge
Blood-tinged or brown discharge between periods can be caused by chlamydia, gonorrhea, or cervical inflammation. It can also indicate more serious conditions and should be evaluated.
When to Test
Any change in discharge color, consistency, smell, or volume that lasts more than 2-3 days warrants STD testing. Do not attempt to self-diagnose based on color alone.
Frequently Asked Questions
Can discharge be normal?
Yes. Clear or white discharge without odor or irritation is usually normal. Changes in color, smell, or accompanying symptoms are the warning signs.
Does yellow discharge always mean gonorrhea?
Not always, but it is the most common cause. Chlamydia can also produce yellow discharge. Testing distinguishes between the two.
Can men have discharge too?
Yes. Men with chlamydia or gonorrhea often notice discharge from the penis, especially in the morning.