Impostor syndrome (also known as impostor phenomenon, impostorism, fraud syndrome or the impostor experience) is a psychological pattern in which an individual doubts their accomplishments and has a persistent internalized fear of being exposed as a "fraud".

Imposter syndrome can come from many things. It can be self doubt in one’s abilities. It can come from making unjustified comparisons to others. It can also be criticism and taking too much in from that criticism. 

Self belief can hold the key in overcoming imposter Syndrome.