For adults, surgery is typically recommended to avoid possible complications, especially if the umbilical hernia gets bigger or becomes painful. During surgery, a small incision is made near the bellybutton. The herniated tissue is returned to the abdominal cavity, and the opening in the abdominal wall is stitched closed. …
https://www.mayoclinic.org/diseases-conditions/umbilical-hernia/diagnosis-treatment/drc-20378689