Constipation

My son complaining of constipation. he is my child that he does not like to eat vegetables. he is acting like a small child so i am getting angry to him that seems he does not studied the basic food groups in school . I bought ripe papaya which is almost over ripe as his dessert every after meal and a glass of pineapple juice. I advised to drink more fluids. The following morning, he passed out successfully. How i wished that he will forced himself to eat fruits and vegetables everyday