Forgetfulness to some extent is a normal characteristic of every human being but if an individual crosses the limit of forgetfulness and cannot even remember simple things or he has a disability to recognize familiar persons or objects; it becomes a serious pathological situation which needs medical attention. Several factors may induce memory loss. Ageing is a prime factor. Other pathological conditions which may lead to impairment of memory are: brain tumor or cancer, head trauma, migraine, infection in brain cells and cerebrovascular stroke. Memory loss can be temporary or permanent. Temporary memory loss can be cured with the treatment of its underlying cause. Permanent memory loss still doesn’t have an effective treatment available. Alzheimer’s disease is an example of permanent memory loss.