The normal white belt is milky white, no odor, or only a faint fishy smell, in the underwear will not appear sour odor, if sour smell: first, in clinical terms is likely to be caused by local inflammation of the vagina, it is advisable to do routine laboratory tests of the white belt, according to the results of laboratory tests, according to the type of pathogenic bacteria infected, and then give targeted drug treatment, so that in clinical terms can achieve In addition, if no pathogenic bacteria infection is found in the clinical field after the routine laboratory test, we should pay high attention to it and exclude the possibility of cervical cancer. Second, clinically, the possibility of endometrial cancer should be ruled out, so it is recommended to do cervical cancer screening and ultrasound examination first. If echogenicity of endometrium is found to be uneven or there is abnormal mass, it is recommended to do diagnostic scraping clinically.