Dissociative amnesia shows severe forgetfulness on the one hand, and on the other hand, it shows the ability to engage in a variety of complex activities and take care of itself in a well-organized manner. It shows that there is a clear contradiction and separation between the patient’s forgetfulness that once occurred and his/her ability to display knowledge, so it is called dissociative amnesia. Some people have amnesia due to damage to the cerebral cortex, while others have psychogenic amnesia due to psychological factors. It is often caused by stress, including traumatic experiences experienced or witnessed by the individual (e.g., physical or sexual abuse, rape, natural disasters), major life stresses (e.g., abandonment, death of a loved one, financial troubles), or great internal conflicts (guilt-driven impulses resulting in trouble, unresolvable interpersonal conflicts, criminal behavior). Others have predisposing qualities, such as those who are easily hypnotized. Most patients are able to recover their memories and eliminate amnesia, but some are never able to overcome the obstacles to recovering the missing memories. The prognosis depends on the patient’s living environment, the stresses and internal conflicts associated with amnesia, and the patient’s ability to adjust psychologically.