10 Warning Signs of Alzheimer's Disease (Medically Reviewed By : William C. Lloyd III, MD, FACS)

1. A Disruption of Daily Life

You just met her but already can't recall her name. You know you made plans for Sunday but can't seem to remember what they are. It's normal to forget names and dates every now and then. But regularly forgetting these and other, more important details could signal a problem. Forgetting recently learned information is common for people with AD.

2. Disorientation

People with AD may be puzzled by time and place. They might confuse the past and present or lose track of time or dates. They may become lost in their own neighborhood, forgetting where they are and how they got there.

3. A Snag in Speech

You've probably had a word on the tip of your tongue but couldn't come up with it. People with AD also may have trouble finding the right word but might halt a conversation completely and not know how to carry on, or may repeat themselves. They might invent words or stop talking altogether to prevent slipups.

4. Problems Solving Problems

Trouble understanding numbers or following steps is another sign of AD. This can make it difficult to concentrate, pay the bills, do simple math, or even follow a family recipe the person has known for years.

5. Losing Things

Where'd I put my keys? You've likely asked yourself the same question before. But for people with AD, it can be difficult to remember where things are or to retrace steps to find lost items. What's more, Alzheimer's can cause people to misplace items by putting them in illogical places, like a placing a toothbrush in the refrigerator.

6. Trouble With Tasks

Everyday tasks that were once easy to do may become big challenges. Even daily grooming, dressing oneself, and eating can be a struggle.

7. Poor Decision-Making

Making consistent or frequent bad decisions or not making decisions at all could signal AD. Bad judgment with money—like giving money to strangers—could be another warning.

8. Loss of Initiative

Lost energy, motivation, or spark for life is another indication of AD. The person may not participate in usual activities like sports, hobbies, or even work. He or she may become socially withdrawn.

9. Resisting Change

We all may be set in our own ways at times, but a person with AD may be unwelcome to changes in routine or uncomfortable with new people or places.

10. Significant Swings in Mood or Personality

AD patients may change from calm to sadness to anger quickly and for no apparent reason. They may become extremely confused, suspicious, or fearful.