As you age, your brain changes. Some parts shrink. Brain cells don't communicate as well as they once did. You may have some mild forgetfulness, and trouble learning new things. This is normal. But some older people experience brain changes that are not normal. And memory loss can be a warning sign that something is wrong. So if you worry about your memory, or if loved ones are worried, you need to tell your doctor. Here's how to make the most of your doctor's appointment.