A study from a Canadian university (Université de Montreal) recently linked insecurity during adolescence to more joint pain and headaches, and that these students are much more likely to develop anxiety and depression
About 20% of teens will experience depression before adulthood
6 in 10 girls believe that they are not good enough or don’t measure up in some way, including their looks, performance in school and relationships with friends and family members.
70% of girls in Chicago specifically believe they are not good enough
Insecure teens can lead to mental illnesses as we mentioned before, and that can lead to make adolescents who grow up insecure much harder for them to find jobs or to be confident in themselves when they're out in the real world.