Ensure the baby has lots of water also fruits and vegetables. Include raisins and amla in the diet. also give fruits like papaya and pear regularly as this helps the stools to soften.

Banana with ghee before sleeping. Liquid cremaffin is given to some but consult your paediatrician once before giving it

Seems like your baby has constipation. Please see your pediatrcian. In the meantime give plenty of water, banana, raisins and high fibre foods