Why Is a Woman’s Vaginal Discharge Green?

Women may notice that their vaginal discharge—normally milky white—is instead greenish in color after sexual intercourse, during routine external genital cleansing, or while using the toilet. What causes green vaginal discharge in women?

What Causes Green Vaginal Discharge in Women?

Green vaginal discharge is most commonly associated with trichomoniasis (trichomonas vaginitis). In this condition, the discharge typically appears yellow-green or gray-green and frothy, often accompanied by pruritus (itching) of the external genitalia. Diagnosis can be confirmed via routine vaginal discharge examination.

Secondly, purulent discharge may also appear greenish or yellow-brown and thick, often with a foul odor. This type of discharge results from bacterial infection and is commonly seen in acute cervicitis or endometritis.

In cases of genital tract malignancies—such as cervical cancer, endometrial cancer, or vaginal cancer—secondary infection may lead to purulent, greenish discharge. The precise underlying cause can only be determined after appropriate clinical evaluation and diagnostic testing at a hospital. Treatment is then tailored according to the identified pathogen—for example, oral or topical vaginal antimicrobial therapy administered over a prescribed course. As treatment progresses, vaginal discharge typically gradually returns to normal.

In daily life, women should maintain good external genital hygiene. It is recommended to gently cleanse the external genital area with plain water daily—especially before and after sexual intercourse. Wearing breathable, cotton undergarments also helps reduce the risk of gynecological infections.

We hope this article has been helpful. Wishing you good health and happiness!