The odor of a woman’s lower body should be emitted by the leucorrhea. Normal leucorrhea should be slightly fishy or odorless, milky white or colorless and transparent. Women’s lower body always smells bad, also indicates that the leucorrhea odor, is not normal performance, usually the reaction of gynecological diseases, women should not ignore this. Experts believe that when women’s leukorrhea always emits a bad smell, the following possibilities need to be determined according to the smell: first, fishy smell, vaginitis caused by Haemophilus vaginalis, whose patients often have a special fishy smell in their leukorrhea, and patients also have symptoms such as vaginal burning, pain, itching, and vulvar wetness. Second, fishy smell, anaerobic infection, trichomonas infection or Haemophilus vaginalis infection vaginitis patients, their leukorrhea often emit fishy smell. Third, foul smell. If the smell of the leukorrhea is foul, women must be further alerted. As this may be related to serious infections or tumors in the reproductive tract, malignant tumors in the reproductive tract, severe endometritis, and severe cervical erosion can cause leucorrhea malodor. Older women who have foul-smelling leukorrhea that is bright red in color, this is often a sign of malignant tumors. When a woman has a long-term lower sacral odor, she should consider the three possibilities mentioned above. Patients should have the relevant routine examination of the leucorrhoea as soon as possible to clarify the condition and then be treated properly under the guidance of the doctor.