Small belly is commonly caused by the following reasons: first, subcutaneous fat accumulation, usually this situation and after meals do not exercise, a long time subcutaneous fat metabolism disorder formation. To exercise regularly to eliminate fatty deposits, diet should also pay more attention to a light diet, less greasy and high sugar content food. If severe fatty deposits need to be treated through surgery, if a woman of childbearing age has stopped menstruating, it means that there is a possibility of pregnancy, if necessary, go to the hospital for relevant tests, do not take drugs indiscriminately to avoid the impact on the fetus. Secondly, there may be a mass in the small stomach, it is recommended to go to the hospital for examination in time to determine whether it is a benign mass or a malignant tumor, common benign masses include small intestine tumors, ovarian cysts, etc., malignant tumors include colon cancer, endometrial cancer, etc.