Criticism is one form of stress, and one must be able to function adequately under it. It is possible to be too sensitive to criticism. Many suffer needless pain and unhappiness because of an extreme sensitivity to criticism. Those who are overly resentful of criticism may be suffering from emotional problems. If their self-esteem is too high and inflated, they resent criticism and may become emotionally disturbed.
Forgiveness is a very good response to criticism.
It takes away the sting and makes it less painful and less important. It is a sound psychological fact that we learn from being criticized. Critical remarks make us stop and consider our ways. The important thing is not to be too stubborn to learn from criticism. Resentment also arises when one sees others who seem to have so much more than he does.