Arrogance is essentially a prideful attitude of superiority. The opposite of humility. Arrogance in Muslims is not only a negative personality trait, it is a dangerous path. Original sin stems from pride when we look at the story of Iblis (satan) refusing to bow to Adam (peace be upon him).
People are not born arrogant, this develops overtime. Success is wonderful, but it does elevate one’s risk for arrogance. In those moments of success and achievement, we must remember to give praise and thanks to Allah (most glorified, most high). This simple act of gratitude and worship keeps us grounded.
Some people act arrogant as a defense mechanism; look a little deeper and that person is actually insecure and they fear rejection. It takes a level of self-esteem and trust in order to allow ourselves to be vulnerable. An insecure person is putting up a metaphorical shield when they act arrogant.
Narcissistic personality disorder describes someone with an over-inflated sense of self-worth and importance. Their sense of entitlement is evident and they do not mind stepping on others to get what they want. Again, we may be seeing a highly arrogant individual on the surface, but underneath that hides levels of insecurity. This person NEEDS validation and praise so they demand it.