There are many reasons why the odor of female pubic area is heavy, the common ones are vulvovaginitis, vaginitis, cervical cancer and so on, all of them are easy to cause such phenomenon, of course, there may also be physiological reasons. 1. Vulvovaginitis: it is a non-specific inflammation, and the sanitary napkins and chemical fiber underwear used by women can cause irritation to the skin of the vulva, which will lead to the odor of the secretion. 2. Vaginitis: if women have trichomonas vaginitis or bacterial vaginitis, and mycosis vaginitis, it is easy to have abnormal secretions, which not only have odor, but also have changes in character, and often have obvious itching symptoms. 3. Cervical cancer: when the patient enters the middle or late stage, the mass is relatively large, stimulated by the acidic environment of the cervix, which will affect the secretion and produce the odor, and after the tumor is necrotic, a large number of tumor cells, which will be infected and necrotic, which will easily lead to the secretion with fishy odor. 4. Physiological: Including poor local hygiene, or sanitary napkins and other products used during menstruation, which affects the local air permeability, and this is also easy to produce odor. It is recommended to go to the hospital in time to check, after the cause is clear, under the guidance of the doctor for treatment, so as to avoid the development of the disease, the body to cause greater damage.