Hi my son is 4 this month and has moderate asd. He with holds his poos and always has done. He has never done what I call a "log" poo. He's on 3 movicols a day, his poos like liquid but he's so strong he manages to hold it in for ages at a time. I mean a week or two at least. His autism is SO exasperated by his constipation. I've told his paediatrician countless times I think his poos he is holding inside his body is poisoning him. When he has had a good clear out he makes masses of progress and his autism does not really affect him. But he has managed to hold lots of poo in in the last 3 weeks and this morning was a nightmare I couldn't "reach" him at all, everything was on his terms, if he couldn't do as he pleased he was head butting smacking and biting me and didn't seem aware of what was gong on around him. He was just repeating reams of script from tv shows and his iPad games. I KNOW it is because he has not "been" . Has anyone else been through this? Has anyone any advice for me I have been feeling so sad all day, I want to get him over his fear of pooping so much :(