Thanks for asking the question. Most common cause of constipation in children is improper dietary practice. Child should take enough water according to his body weight and fibre rich food. If the child is taking these properly and the child is not sedentary, then should be evaluated properly by a pediatrician. And you mentioned that your child is falling sick for every 10 days. What are the symptoms of the sickness? what you actually mean by that? Such a child should be evaluated properly.