The pain in the stomach with anal pain may be caused by the following reasons: 1, infection: there is a serious infection in the abdominal cavity, when the infection is more serious can lead to intestinal spasm, and also cause pain in the anus, need to go to the hospital as soon as possible to improve the relevant examination, such as blood routine, C-reactive protein, abdominal ultrasound or abdominal CT. If the disease requires antibiotic treatment, commonly used drugs are cephalosporin antibiotics or penicillin antibiotics, etc., and sometimes need to carry out surgical exploration, related treatment. 2, acute enteritis: may be caused by acute enteritis, usually with a lot of alcohol or spicy food, you can actively adjust the diet structure, and oral antispasmodic drugs to solve the pain. 3, uterine adnexal Diseases: If a woman cannot be excluded from the uterine adnexal diseases, such as adenomyosis, fibroids, etc., you can check the ultrasound for clarification.