Hello, my son is nearly 4 and having assessments for ASD. He was fully toilet trained by 22 months, and had no signs of ASD at this point. His ASD symptoms began at around 2.5 years, and have been gradually getting more and more profound. About a year ago, we started having problems with toiletting. He just will not (or cannot?) tell anyone when he needs to go anymore. He will just hold on and hold on for hours and hours until he eventually has an accident. I don't usually let it get to this point at home, as I can tell when he needs a wee, so I take him to the loo, but at school he just constantly wets himself, and refuses to go when told. He has also become TERRIFED of going for a poo. He will hold on for days, and eventually ends up in such pain and discomfort, that I take him to sit on the loo. He then cries and screams until he manages to go. At school he has had some soiling accidents and he refuses to go with anyone except myself. He is not constipated by the way, simply holding on to it! This is becoming a major issue as it is taking over our life, and school are constantly moaning at me about it, as they just don't know how to deal with it. Has anyone else had similar issues with their children, and any advice would be really helpful.