The reason for this is related to the following situations: 1. It may be that you are about to have your period, many women will have PMS before their period, due to endocrine hormone disorders, the body’s prostaglandin secretion is strong, which may lead to small stomach distension, and at the same time, there may be waist pain, increased leucorrhea and other problems, all belong to the normal reaction; 2. When there is inflammatory stimulation inside the cervix and vagina, it will lead to congestion in the pubic area, resulting in abdominal pain, lumbar pain and other symptoms, and this will be accompanied by increased leucorrhea, leucorrhea odor and other performance symptoms; 3, other diseases can not be completely excluded, such as endometritis, pelvic inflammatory disease, malignant tumor and other diseases, can trigger such symptoms, it is recommended to first observe the seriousness of the disease is best If the disease is serious, it is best to treat it in time.