I came across this Dove video recently and it really challenged me
It challenged me to take a step back and consider how I view myself, to think about what I say to myself and about myself.
Sometimes we have a bad day where we don't feel our best (a certain time of the month springs to mind) and that's fair enough
It's when we constantly look in the mirror and find faults or feel that we are somehow lacking in our looks that it becomes a problem.
I believe that beauty is in the eye of the beholder (which happens to be yourself when you are looking in the mirror) and your perception of your beauty is a state of mind.
It's about changing your thoughts about how you view yourself, and accepting who you are in all your natural beauty as being perfect just the way you are.