A woman’s lower body odor is usually considered to be caused by uncleanliness, vaginitis, pelvic inflammatory disease and other reasons, but also need to be based on the patient’s specific symptoms to determine. 1. Hygienic uncleanliness: due to the local cleaning is not in place, not clean scrubbing after bowel movement, underwear is not breathable, the environment is humid, bacterial growth, leucorrhoea, urine stains accumulation and so on leading to the appearance of bad smell. 2. Vaginitis: patients may have odor due to trichomoniasis, bacterial vaginosis and other diseases. 3. Pelvic inflammatory disease: due to pelvic inflammatory disease induced abnormal leukorrhea, accumulation of purulent material in the uterine cavity, a large amount of purulent secretion is discharged through the vagina, and the odor will appear when it is discharged. In addition, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to determine the cause of the disease and then give targeted treatment or treatment.