At this age having constipation
might be due to,
Less food intake,
Less use of green vegges and fiber containing food,
Less water intake,
Lack of active exercise.
Do not make a habit of taking dulcolax
Do regular physical exercise like running,swimming.
Do abdominal recti exercise.
Avoid junk food or change food style.
Take fresh fruits like oranges,papita, banana,
Take plenty of water.
Ok and bye.