My boy of 3 years can't poo or find it hard to poo, what can I do?
Your child is probably constipated.

You need to give lots of water and also endeavor to give fruits like fresh orange juice, watermelon e.t.c as well as vegetables and food rich in fibre. Avoid junk foods as well. If you are giving cereals also ensure you mix with the right quantity of water.

But if it persists, see a paediatrician for evaluation and management.