3 1/2 yr old son, spells of constipation/diarrhea. always had problems pooping. limited food intake, starves himself. blood/urine good. can't talk yet?

Limited food intake: I douby if your child is starving himself. Rather children at 3-4 years of age are oivky eaters because they are hardly growing at this age. Because his intake is inconsistent, his output can also be inconsistent in having spells of constipation and diarrhea.Try high fiber foods such as fruit, vegetables, nuts, raisins, figs, and dates to overcome his constipation and diarrhea.