The main symptoms of vaginitis are abnormal vaginal discharge, itching of the vulva, odor of the discharge, accompanied by burning, pain in the vagina and vulva, and painful intercourse. The discharge of trichomoniasis is characterized as thin, purulent, yellowish-green, foamy, and smelly. The discharge is purulent because it contains white blood cells, or yellowish-green if it is combined with other infections. The frothy, foul-smelling discharge is due to the anaerobic enzymatic carbohydrates of the trichomonas, which produce a putrid odor. Mycosis is typically characterized by a tofu-like or curd-like discharge, while bacterial vaginitis is characterized by a homogeneous, thin discharge with a fishy odor. The itching is mainly at the vaginal opening and vulva. If combined with urethral infection, there may be frequent and painful urination, and sometimes hematuria is seen.