There are more reasons for the odor in the bottom of the girl, it may be caused by various vaginitis, the common ones are bacterial vaginitis, vulvovaginal pseudofilamentous yeast disease, trichomonas vaginitis and so on. 1. Bacterial vaginitis: The leukorrhea produced by bacterial vaginitis is thin, yellow or creamy white, tea-brown and has a fishy smell, accompanied by an increase in the amount of leukorrhea. 2. Vulvovaginal pseudomycosis: the main symptoms are vulvovaginal itching, burning pain in the vagina, pain during sexual intercourse, pain during urination, increased leukorrhea like tofu dregs, and accompanied by a bad smell. 3. Trichomonas vaginitis: common vulvovaginal itching, increased vaginal discharge, can be yellowish green, thin texture, foamy, odor, can be accompanied by burning sensation, pain, painful intercourse. There are many other reasons for the odor of the girl’s bottom, it is recommended that patients seek medical attention in a timely manner to improve the relevant examination, under the guidance of specialists in symptomatic treatment.