After menstruation, the most common reason for smelly vaginal discharge is due to bacterial vaginosis, which can be treated by inserting metronidazole pessary or ornidazole pessary into the vagina for a week, and if there is no smelly discharge after stopping the medicine, it indicates that the disease is cured; if there is still a smelly discharge, you must go to the hospital to do a detailed checkup, which mainly excludes pre-cancerous lesions of the cervix, cervical cancer, endometrial cancer, fallopian tube cancer, and other cancerous diseases. The main purpose is to exclude precancerous cervical lesions, cervical cancer, endometrial cancer and fallopian tube cancer. It is recommended to do cervical cancer screening and ultrasound examination, mainly to know the thickness of endometrium and whether there is any abnormal pelvic mass. The odor of vaginal discharge is commonly caused by vaginal inflammation, but it is also recommended to rule out other diseases caused by infection.