The bulging of the sides of the lower abdomen in women is considered to be related to obesity, pathologic ascites, pelvic masses and so on. 1. Obesity: If women like to eat greasy food, it may lead to the accumulation of abdominal fat, which in turn leads to the thickening of abdominal fat and increase in volume, which may appear on both sides of the abdomen. 2. Pathological ascites: if a woman has cirrhosis of the liver or ovarian cancer, a large amount of ascites will be formed in the abdominal cavity, at this time, the woman will also show abdominal distension, and the liquid will flow downward by gravity when she stands up, which will lead to the bulging on both sides of the lower abdomen or diffuse bulge. 3. Pelvic mass: for women with adnexal masses, localized occupying lesions may lead to bulging on both sides of the lower abdomen, as well as menstrual abnormalities, abdominal pain and other manifestations. For women with bulging lower abdomen, it is recommended that they go to regular hospitals for medical treatment to clarify the cause of the disease and then actively treat it under the guidance of the doctor.