Repression is another well-known defense mechanism. Repression acts to keep information out of conscious awareness. However, these memories don't just disappear; they continue to influence our behavior. For example, a person who has repressed memories of abuse suffered as a child may later have difficulty forming relationships.
Sometimes we do this consciously by forcing the unwanted information out of our awareness, which is known as suppression. In most cases, however, this removal of anxiety-provoking memories from our awareness is believed to occur unconsciously.