I've heard having issues with anger is a component of it but I never saw it being listed as a symptom. I only saw it being said about ADHD in the books and with ODD which is often a component of ADHD. And some people just have anger issues and nothing else. My uncle had issues with anger so he would punch holes in his walls and he had a short fuse so it was easy to piss him off. I just didn't want to be around him at all when I learned he had that side of him when I was 14 when my dad took him to the Oregon coast with us so he could take care of us kids while my dad did the Hood to Coast thing. Plus he throws out verbal abuse and then goes apologizing and I didn't tolerate it as a child so never again I wanted to be around him. My mom says he had anxiety so that could explain his anger and it was easy to set him off I felt I was walking on eggshells and I didn't like being anxious around him and jumping every time he gets upset and constantly thinking what could make him mad. I am not sure why he was angry and short tempered. My dad gets angry too when he is concentrating and focused and then you interrupt him but he has ADHD. If he very busy and trying to get his work done, he gets testy and short tempered. Plus when he gets low blood sugar, he gets that way too.
_________________
Son: Diagnosed w/anxiety and ADHD. Also academic delayed and ASD lv 1.
Daughter: NT, no diagnoses. Possibly OCD. Is very private about herself.