Forgetting - it is disturbing experience which causes feeling of despair. The person hopes to recollect everything, that by it has been remembered earlier, and that during the certain moment he wishes to restore. Nevertheless sometimes happens so, that he forgets a name of one of acquaintances or cannot recollect, where has left keys from the car. In other cases he forgets to wish the loved one happy birthday or cannot keep in a head any information on the eve of examination for which long prepared. Then, when memory refuses, the person most full realises, that in its functioning there are failures. And it should set to itself (himself) of following questions: whether the normal phenomenon considers what I forget these things, or to me there is something serious? How to define that moment when the forgetting really will start to represent a serious problem?