Narcissistic withdrawal is when someone who thinks they are very important, stops talking to or being around other people. It's like when you get upset and don't want to play with your friends anymore.
But for some people, they only care about themselves and how they feel, so they don't want to be around others if they don't get what they want. They might even start to feel sad, angry, or scared when they aren't getting attention or praise from others.
This can happen when they feel like they aren't getting enough attention or when they are going through a tough time where they feel like they aren't the center of the universe. Instead of talking to someone about their feelings, they just stop talking to others altogether.
It's important to remember that this behavior is not healthy and can hurt both the person doing the withdrawing and the people around them. It's important to try to talk to someone about your feelings and find healthy ways to cope with difficult emotions.