Learn about the brain, its parts, each part's functions, and how the brain is protected.

When you're pregnant and have an asthma flare-up, it affects both you and your baby. Learn how to manage your asthma during pregnancy.

Follow up with your doctor as you are told. You will likely feel better in a week or 2. But a dry cough can linger beyond that time. Let your doctor know if you still have symptoms (other than a dry cough) after 2 weeks.

Yellow fever vaccine can prevent yellow fever. Yellow fever is a serious disease caused by the yellow fever virus. There is no medicine to treat or cure yellow fever.

Typhoid fever can be a life-threatening disease. Typhoid vaccine can prevent typhoid fever.

When your estrogen level falls, you may have symptoms. You also may be at a greater risk for osteoporosis and heart disease. Your diet, family health history, lifestyle, and other factors affect your symptoms and risks.

Here is an explanation of how food moves through your body and what each part of your digestive tract does.

If you've had a kidney stone, you may worry that you'll have another. Removing or passing your stone doesn't prevent future stones. But with your health care provider's help you can reduce your risk of forming new stones.

Percutaneous nephrolithotomy is a procedure that is done when one is not able to pass larger stones on their own. It may be done before, after, or instead of other treatments.

Ureteroscopic stone removal may be done before, after, or instead of other treatments. If you need this procedure, your doctor will discuss its risks and possible complications. You will be told how to prepare. And you will be told about anesthesia.