Narcissists always need approval and admiration from other people. This is why, when they don’t get constant approval, it triggers their hidden feelings of shame that prompt them to lash out and show intense outrage reactions without considering the other person’s feelings into account.
Most of the time, the narcissist’s rage could be completely out of proportion, and the other person would be surprised by this kind of reaction. However, there are two basic signs of narcissistic rage. For instance,
Outward Signs
Angry outbursts when not given the attention they believe they deserve
Aggressive or violent outbursts
Ferocious rage
Unexpected outbursts of rage
Yelling and screaming
Being hostile, either verbally or physically
Incapable to restrain anger
Intentionally attempting to hurt others (mentally or physically)