Hi .does anyone have any experience or knowledge of this? My 14yo is becoming awful to live with and a bit of research led me to this condition which sounds very like his behaviour. He is waiting on diagnoses for ADHD and Autism, has become (more than is usual for a teen) surly, rude, selfish and then on the basis of the tiniest thing will hugely overreact, smash game controllers, shout and swear and his sister, slam doors repeatedly etc. His attendance at school was only 75% last half term and some mornings he woke up in that angry mood. I'm seeing the GP this week but just wondering if there's any experience out there. Thanks.