Alzheimer's disease begins slowly. At first, the only symptom may be mild forgetfulness. People with Alzheimer's disease may have trouble remembering recent events, activities, or the names of familiar people or things. Simple math problems may become hard to solve. Such difficulties may be a bother, but usually they are not serious enough to cause alarm.
However, as the disease goes on, symptoms are more easily noticed and become serious enough to cause people with Alzheimer's disease or their family members to seek medical help. For example, people in the later stages of Alzheimer's disease may forget how to do simple tasks, like brushing their teeth or combing their hair. They can no longer think clearly.
They begin to have problems speaking, understanding, reading, or writing. Later on, people with Alzheimer's disease may become anxious or aggressive, or wander away from home. Eventually, patients need total care.