Alzheimer's disease (AD) is the most frequent form of neurodegenerative disease in the elderly. Short-term memory loss is the most common symptom in patients, followed by executive dysfunction, confusion, agitation, and behavioral abnormalities. Alzheimer's disease is the most frequent cause of dementia that is permanent and progressing. Alzheimer's disease, for example, is a brain disorder that causes dementia. Dementia is frequently caused by a complicated combination of circumstances, including our age, medical history, and lifestyle, as well as our genes. The majority of dementia cases are not caused by genes that we inherit from our parents. Our physical features, such as eye color and height, are determined by our genes. They may be able to predict whether or not we may get a disease in some circumstances.