Umbilical hernia in a child - indication for surgery is/are

An umbilical hernia is d/t fascial defect at the umbilicus. Treatment : Most hernias close spontaneously by 1 yr of age. Even larger hernias are known to disappear spontaneously by 5-6 yrs of age. Surgery is advised for hernias : Persisting beyond 4-5 yrs. Causing symptoms. Becoming strangulated. Defect exceeding 2 cm. Progressively enlarging hernia after the age of 1-2 yrs. Strapping is ineffective.