You don't! There are many things that can cause memory problems! Stress is one of the most common. If you have concerns, do not try to diagnose yourself! Make an appointment with your family doc and if medically cleared, see a geriatric psychiatrist in your area.
Symptoms of Dementia. The development of multiple cognitive deficits manifested by the impaired ability to learn new or recall previously learned information. Plus, disturbances in language and motor functioning, failure to recognize objects and inability to execute functions such as planning, organizing, calculating. These deficits cause a major ipairment in social or occupational functioning affecting independence.