The odor in women’s bottom is considered to be related to bacterial vaginitis, cervicitis and cervical cancer, while the odor in men’s bottom is considered to be related to glansitis and prostatitis. 1. Bacterial vaginitis: the disease is mainly due to the ecological balance of the bacteria living in the vagina is out of balance, and sexual life is chaotic, bad habits and other triggering factors. Usually women will have a fishy odor down there, and accompanied by increased vaginal discharge, mild vulvar itching and other symptoms. 2. Cervicitis: mainly caused by pathogen infection, and vaginal flora disorders, multiple sexual partners can also induce cervicitis. Typical symptoms of patients include increased vaginal secretion, irregular vaginal bleeding, pain in waist and abdomen, etc., which can also be manifested as odor in the lower part of the body. 3. Cervical cancer: it belongs to a kind of malignant tumor, which is mainly related to HPV infection, multiple sexual partners, heredity and other factors. The disease can also cause odor in some patients, and it is easy to be accompanied by increased vaginal secretion, vaginal bleeding and other symptoms. 4. glans: pathogen infection, circumcision, etc. can cause glans, the typical symptoms of patients with redness and swelling of the foreskin and burning pain, fever, body fatigue, glans increased secretion, can also be manifested in the following odor. 5. Prostatitis: mainly due to pathogenic infection, sedentary, alcoholism and other factors, the patient’s typical symptoms of frequent urination, urinary urgency, urinary pain, perineum and suprapubic pain, a few cases can also appear below the odor phenomenon. There are many reasons for the odor, and it is recommended that patients seek medical treatment in a timely manner.