the difference between suppression and Repression

Suppression is similar to repression, but there are some subtle differences. In repression the person "unconsciously" pushes painful or difficult memories, actions, etc. out of consciousness. However, suppression is a "conscious" exclusion (or "pushing" down) of these painful memories, thoughts, etc. In this way, we control impulses consciously as opposed to unconsciously.

Read more: http://www.alleydog.com/glossary/definition.php?term=Suppression#ixzz3HyJGcT1C