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.
Failure to disappear by 3 years
> 2 cm size
Symptomatic
All of the above