There are several reasons for women to have fishy odor: First, women may suffer from vaginitis, such as bacterial vaginitis, trichomonas vaginitis will cause fishy odor of the vulva, and there will be vulvar itching, abnormal leukorrhea and other symptoms, and it is recommended that the patient go to the hospital to do the examination of secretions to confirm the diagnosis of the condition. Secondly, women may suffer from cervical cancer, endometrial cancer and co-infection, so they can go to the hospital to do HPV examination, ultrasound examination and cervical biopsy if necessary. If the condition is diagnosed, timely surgical treatment is needed. Thirdly, women may suffer from pelvic inflammatory disease, which will cause leucorrhoea increase and make the vagina have fishy smell and may be accompanied by pain in the lower abdomen, so they should go to the hospital to do the relevant examination in time. In addition, if the vulvar fishy smell is not very serious, it belongs to the physiological, general leukorrhea will have a slight fishy smell, belong to the normal, no special treatment.