aaah, that explains it (I am 'mum', when it is being shouted down the stairs, and 'mama', when my dds have done something they know will get them told off!)
Nothing has been done wrt to ds's digestive system, apart from meds for acid reflux. I mentioned the constipation/impaction(?) to his gp the other day, and she seemed to think that as long as it doesn't cause him pain, then there is no need to address it. However, I do think it keeps him awake at night, sometimes, he has been restless, and drawing his knees up throughout the night, before he does a poo. It is also difficult to pinpoint the cause of pain, when there is no speech, and when he screams and cries a lot!