If it is trichomonal vaginitis, the secretion is thin pus, yellow-green, foamy and smelly. The secretion is purulent because it contains white blood cells, and yellow-green if it is complicated with other infections; Foamy, smelly, ozone is produced by anaerobic hydrolysis of carbohydrates by trichomonas, and the specific itching parts are mainly vaginal opening and vulva.

If combined with urinary tract infection, frequent urination, urgency and sometimes hematuria may occur. Trichomonas vaginalis can devour sperm, hinder the production of lactic acid, affect the survival of sperm in vagina, and lead to infertility. Examination shows that the vaginal mucosa is congested, and in severe cases, the cervix is scattered at the bleeding point, forming a strawberry-shaped cervix. A large amount of leucorrhea in the posterior fornix is grayish yellow, yellowish white thin liquid or yellowish green purulent liquid, often in the form of foam, and the vaginal mucosa of the carrier has no abnormal changes.