There is a pile of fat protruding below the belly button, which may be caused by factors such as abdominal fat, pregnancy and abdominal lesions. 1. Abdominal fat: usually do not pay attention to diet, often eat high-fat, greasy food, overeating, resulting in a large amount of fat accumulation in the abdomen, resulting in a pile of fat protruding below the belly button. Usually less exercise, after eating a long time sedentary, will also lead to the accumulation of small abdominal fat. 2. Pregnancy: When a woman is pregnant, her uterus and fetus gradually grow, which may lead to a protruding belly. 3. Abdominal lesions: If there are diseases in the abdominal cavity, such as uterine fibroids and colon tumors in women, with the gradual increase of tumors, it may lead to the protrusion of small abdomen. It is recommended to increase the amount of exercise, do not sit for a long time, and reduce the intake of greasy and high-fat food. If necessary, go to the hospital to understand the cause, targeted treatment, to avoid further aggravation of the lesion.