My seven year old has the odd very violent temper tantrum were he shouts, punches and hits! Very distressing for all. Can go a few months without having one then has a couple within a few weeks of each other. Kept a food diary and cannot come up with any links. Seen a child pyscologist they thought he was okay, big boy for his age and that was why they seemed extreeme. Just put down to a behaviour issue. Any ideas