Teens these days especially girls are over criticizing themselves or changing who they are to fit in. Have you ever looked in a mirror and said nothing to yourself but how ugly you THINK you look? This is what starts low self a steam and low levels of confidence. Also teens are always forgetting who the are by changing things about themselves trying to leave behind their true selves doing certain thing every day can help reduce these things.
Plan of Action
Say at least ONE positive thing about me every day.
When you look in the mirror don't be over critical.
Find unique things about yourself that make you, you
Be confident about yourself and use true beauty when you judge you and others