Hi our son is about to turn 4 and has moderate autism and over the last 2 days seems to have regressed. I'm devastated. I'm not sure if its because he is with holding his poos which really affects his behaviours, but tbh it feels like he has regressed entirely, he is very very echolalic and has become aggressive. He used to be aggressive before when he couldn't get his own way, he would bite his hands or bang his head but the last couple of days he has been hitting out me and head butting me over and over and biting me, and he has bitten two of his nursery staff. It's always when he can't do exactly as he wants to do. But he has always been very wilful. It's hard to describe but I do feel like his autism patterns have shifted and taken a turn for the worse. He's not so responsive. I'm gutted as he was making excellent progress and was happy and now he seems unhappy I feel like I'm losing my boy cos of the way he's been over the last 2/3 days. Do children become more autistic? Or do there autism patterns change with age?