My son is 9 years old, and lately, he is having anger issues. His reactions are extreme, like hitting a friend. I have started receiving complaints from teachers. I tried talking to him, and he is feeling sorry for his behavior, but this is happening a lot that for very, very small reasons, which are maybe big things for him. He is losing cool on them, and i am witnessing reactions. please help, i want to address this at the right time.