What are the signs of Narcissism?

Well I don't like self-centered rappers, but to go and say you hate rap is unnecessary. Your question was what are signs of Narcissism not about rap. Point is, many people happen to be narcissists and don't even know it. Some signs include; low self esteem, picturing their life online to be perfect, and most of the time these people are Extroverts. Also, these are people that need compliments to feel good about themselves and then put others down.