Me and my husband have gone with him to the doctors many many times, and they always say he is constipated, and give us some medicine for that, like sorbitol, or microlax. It
cleans it out a little bit, but it just keeps on going. (I live in Iceland, dont know if they have those in other countries) Recently we went to a new doctor who sent him for an xray, that found that he was really constipated, and gave him stronger medicine, senokt and laxoberal.