The accumulation of fat under the viscera and body epidermis makes the abdomen bigger. According to Baidu Health Medical Beauty, women's obesity often starts from internal organs, especially the gastrointestinal system. When women eat too much fat, which leads to fat accumulation, most of them first appear in the intestine, then in the liver, stomach and other system organs; Under the skin of the body, it usually starts to accumulate under the skin of the abdomen, then the buttocks, thighs, and finally the face and whole body. The accumulation of fat under the internal organs and body epidermis leads to the outward expansion of the stomach and the enlargement of the stomach.