His diet must contain lot of fibre.
Add lot of vegetables, fresh fruits, fresh fruit juices, soups to his diet.
Make sure he takes plenty of fluids daily.
A glass of warm water daily in the morning will help him.
Avoid junk food, excess of oil, potato, Banana, biscuits etc.
Check with your doctor if he has any anal fissures- if so he might need to take stool softeners and local gels till the fissure heals. Else he will start holding the stools because of pain and it will again cause hardening of stools.
will be better and safer than Dulcolax
Dose of Duphalac will be 1 ml/kg/dose given at night.
Based on the response, the dose and frequency have to be adjusted.
He has to take this medication for a minimum of 3 weeks.
Follow these measures for a month. Even after these if no improvement is seen, further investigations may be needed.
Hope my answer helps you.