He was clean until this last term, then now he seems always to come home with stinky pants. He doesn't seem to be constipated as he'll usually do something at home before school, but it's his afternoon poo that usually causes problems. He claims it doesn't hurt him to poo and reckons he makes a mess simply because he doesn't go soon enough. Trouble is, he just doesn't seem to care. The accidents always seem to happen when he's distracted playing & simply can't be bothered to take himself to the toilet in time. We've tried reward charts, ensuring he has enough to drink (diet seems ok). What next? Do I need a word with his teacher? Is there a medical problem?