Why has my child suffered in constipation every day...that's why he was not eating properly and his weight can't increase..plz share a solution

A. You can ask your doctor if you can give a laxative to the child for 3 to 4 days to pass easy motion second I’m going to recommend you that you should definitely give 30 ML of prune juice in the night before sleeping along with that you can apply a drop of castor oil in the navel before sleeping and start the glass of warm water