<s>[INST] My son is 3 1/2 and has had problems with withholding faeces for over two years now. He is on movicol daily and senna as required if he hasn t passed stool for a while. He had a short period when he passed stools well and went to toilet without being encouraged to but this only lasted few days then he held it in for a week needing senna and being restrained to pass motion. Any advice please [/INST] Give plenty of fibres like fruits ,vegetables and liquids and motivate to go to toilet daily.main treatment is dietary modification. </s>