Amnesia is a shortage in memory brought about by mind harm or disease. Amnesia can likewise be caused incidentally by the utilization of different tranquilizers and trancelike medications. The memory can be either completely or somewhat lost because of the degree of harm that was caused. There are two fundamental sorts of amnesia: retrograde amnesia and anterograde amnesia. Retrograde amnesia is the failure to recover data that was obtained before a specific date, for the most part the date of a mishap or operation. Sometimes the memory misfortune can stretch out back decades, while in others the individual may lose just a couple of long periods of memory. Anterograde amnesia is the powerlessness to exchange new data from the transient store into the long haul store. Individuals with this sort of amnesia can't recollect things for significant lots of time. These two kinds are not fundamentally unrelated; both can happen all the while.