If there is a bad smell down there, it is mostly caused by inflammation of the genitals, such as vaginitis, endometritis, infection in the uterine cavity, etc. You should go to a regular hospital for a timely checkup, and you can take a routine laboratory test of vaginal discharge and white belt to confirm the diagnosis. After the condition is diagnosed, medication should be administered according to the course of treatment under the guidance of the doctor. In case of gynecological inflammation, it is easy to have recurrent attacks and if not treated regularly, it will not only aggravate the disease but also cause chronic inflammation. If it is determined to be vaginitis, you can choose different medications according to different types of vaginitis. Also, you should pay attention to washing your vulva with warm water at the right time and avoid wearing tight underwear.