Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not to worry much. Your son might be having a behavioral problem related soiling which normally is known as encopresis. Encopresis also known as paradoxical diarrhea is voluntary or involuntary fecal soiling in children who have usually already been toilet trained. Persons with encopresis often leak stool into their undergarments. Strict behavioral alteration therapy is what your son requires. Make sure you are a bit more strict. Schedule sitting times, typically after meals. Adhere to them strictly. Please post a direct question to me in this website. Make sure that you include every minute details possible. I shall prescribe some psychotherapy techniques which should help you cure your condition. Hope this answers your query. Available for further clarifications. Good luck.