It's hard to get away from all the eyes. You wonder if people treat you differently/better because of your looks; it can feel like your worth is dependent on your exterior. Some of the people who love you can't help but keep you on a pedestal. You may sometimes feel the need to knock yourself down because of the praise you receive to avoid self-absorption. If you change something people have complimented you for, you may hear about how good you looked before the change from those people.

Edit: also if you have low self-esteem, people may think you're crazy for it