Have you ever done something and then had a little voice inside say "Have you done enough? or Shouldn't you have done that differently?"

Then say hi to your inner critic. Just one of the many inner selves. Some others you may already know are, the inner child, the pusher, the judgmental parent. These inner personalities are there to help us, and there are always two sides involved. However sometimes one personality gets locked into doing its job and totally overpowers the other side. It suppresses it so much that it either gets locked away inside or explodes out with a vengeance, generally at an inappropriate time.