Yellow or green vaginal discharge can be caused by a variety of factors, most commonly infections. The most frequently observed causes include:
1. Bacterial Vaginosis (BV): This condition occurs due to an imbalance of the natural bacteria in the vagina. The discharge from BV typically has a strong, fishy odor and can appear yellowish.
2. Trichomoniasis: This sexually transmitted infection (STI) is caused by a parasite and often results in a frothy, yellow-green discharge. It may also be accompanied by itching, burning, and an unpleasant smell.
3. Gonorrhea: Another STI, gonorrhea can produce a greenish discharge along with pelvic pain and frequent urination.
4. Chlamydia: Though often asymptomatic, chlamydia can sometimes cause yellow discharge.
