Constipation unusually diet related.. Pl increase fluid content in the diet.. For example if your child is 10kg he should have at least 2-3litres of liquid in a day... Secondly fruits like papaya can be added to increase roughage from diet. Add greens Avoid maida and bakery products... Decrease milk in diet. For stool softener add Muout powder 1tsf in 1glass of water for 2 weeks.