This condition occurs when there is a lipoma or fibroid under the skin. A bulge is felt on the stomach and disappears after a while, usually without pain, and the diagnosis is confirmed by abdominal ultrasound and physical examination, and there is no need for surgical treatment, which needs to be decided according to the patient’s actual condition. This condition can also occur in women after pregnancy, due to the baby’s fetal movement. Usually, around 20 weeks of pregnancy, there will be a bulge on the belly, which will disappear after a while, this is the baby moving inside the belly, and it will gradually decrease after 38 weeks. You can observe the baby’s situation through ultrasound examination. You should do a good job in pregnancy checkup to ensure the normal development of the baby and the health level of the mother-to-be. You should consider hernia when it appears in the small tummy area, and you should have surgery in time after the diagnosis.