my son is 5 years and 6 months old. He is normal in eating but he doesn't gain weight and height. and I have a great problem of his potty training. first he had constipation problem . but for past 1 year he goes potty normally . But he doesn't say when he wants to go to potty and goes in panty itself. He says when he wants to go to urine but doesn't say when he wants to go to potty . I tried a lot and trained him but he doesn't say . he doesn't feel anything or not I don't know . please help me , he goes to school also . and in school also he doesn't say when he wants to go to potty . what should I do