Women who feel a bad smell down there are commonly due to vaginitis, gynecological tumors and other diseases. Specific treatments should be judged according to the patient’s personal situation: such as oral medication, external lotion or surgical treatment. 1. Vaginitis: generally manifested as increased secretion, odor and vulvar itching and other symptoms. It can be treated with oral antibiotic drugs such as metronidazole and external lotion such as potassium permanganate solution, etc. Note that the use of metronidazole may cause gastrointestinal adverse reactions. 2. Gynecological tumors: often manifested as abnormal vaginal discharge, bleeding, etc., the discharge odor is more intense, at this time, we should determine the specific form of the tumor in detail, and take corresponding surgery or radiotherapy and chemotherapy for treatment. The odor may also be related to gynecological diseases such as cervical erosion, and it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor. Patients should also improve their personal habits, regularly wash the external vagina, change clean and breathable underwear in time.