After the birth of a child small abdominal protrusion is caused by the following two conditions: 1, pregnant women’s uterus will continue to increase with the growth of the fetus, late pregnancy in the limit, and after the birth of a baby the uterus should quickly retract and return to the prenatal state. It usually takes about 10 days for the uterus to return from the abdominal cavity to the pelvic cavity, and during this period the uterus is slowly recovering. In the first few days after childbirth the uterine floor is located 1-2 fingers below the umbilicus, you will feel an obvious protrusion on the belly, is not recovered well the uterus. 2, when pregnant pregnant women abdominal skin overstretching leading to belly flaccidity, coupled with the more nutritious things eaten during pregnancy, abdominal fat is also thicker, it will lead to small abdominal protrusion.