Aggression causes new nerve cells to grow which can trigger even more rage in the future.
“Researchers studied changes in brains of mice with aggressive behaviour. After winning a fight, mice became angrier and new neurons appeared. This in turn appeared to cause them to become more aggressive. Study could shed light on angry behaviour and even how autism develops. From increased anxiety to high blood pressure, it’s well known that anger is bad for our health. But a new study suggests becoming full of rage could change the structure of the brain itself, with the production of nerve cells in the hippocampus. Activity in these new nerve cells was seen with the continuation of aggressive behaviour in an experiment involving male mice, which became increasingly angry. This suggests that the act of getting angry makes us angrier and the cycle continues.” Ref