Is your memory playing up? Here's when to worry (and when not to)

Do you find yourself forgetting things easily? Perhaps there's a name or word that's on the tip of your tongue, or a phone number that you've known all your life that you can't quite recall?

See also: Will this pill cure Alzheimer's disease?

See also: Five ways to improve your memory

Is it normal to do this? When is it a sign of something more serious? Sometimes, being forgetful can be an early sign of Alzheimer's.

This video takes a look at what you should and shouldn't be worried about.

See also: Lack of sleep may be related to Alzheimer's