NPD is a medical acronym for a condition known as
Narcissistic Personality Disorder. This condition may affect one person differently than how it would affect another, but some of the most common symptoms are as follows: Making themselves seem superior while others would say it's for no good reason at all, fear of being criticized, denied, or rejected, entitled to achieving a goal in ways which may put others at a disadvantage, always showing off their appearance while refusing to appreciate others over theirs, doing what pleases them instead of anything else,
gossiping, being self-secure, etc.
Unfortunately, it may be sort of complicated for health professionals to help some with NPD tackle this since they may reject aid or (without
stereotyping) deny that they have this condition.
Example:
It's been said that if you can label someone as being the
popular kid at school, they might have NPD. However, that depends on a variety of
circumstances. Also depending on such circumstances, one may even see one as being
a bully among peers.