Nearly half of young people aged between 9 and 21, also known as 'Generation Z', say they are always anxious.
Half of them admit to being worried about themselves and a third say they have Imposter Syndrome, according to market research agency YouthSight.
One young person told ITV, "When I got my first and second jobs I felt like somehow I'd cheated my way into them and tricked people into hiring me."
Anita Amini said, "I was just feeling a lot of self doubt and that in a way I didn't deserve my achievements and that somehow I'd cheated my way into the positions I was in."
As part of our series 'Generation Anxious' we have spoken to those who experience feelings of self-doubt and believe they don't deserve the things they've accomplished.
Watch Ashna Hurynag's full report: