Young and old people can develop AS. But it’s more common in people ages 17 to 35. Men are more likely than women to have AS. You are also more likely to have it if someone else in your family had it.

Reverse total shoulder replacement is a type of surgery. It's done to repair an injury to the rotator cuff. Here's what you need to know about recovering at home.

Here are step-by-step images that show how to brush your teeth.

Here are images that show the steps of using a peak flow meter.

Here are images that show the steps of using eye drops.

Here are images that show the different steps of using nasal spray.

Tongue-strengthening exercises can help you swallow better. You may need these exercises if you have trouble swallowing (dysphagia). With practice these exercises may help make your tongue stronger and able to move more easily.

Your child's PICC line is an important part of their health care. To care for your child's PICC line, you'll need to flush it. Here are instructions on what to do.

Supraventricular tachycardia (SVT) is a type of abnormally fast heartbeat. The heart normally beats 60 to 100 beats per minute. With SVT, the heart beats more than 100 times a minute. It may beat as fast as 250 times a minute.

Congenital hypothyroidism is when the thyroid gland does not make enough thyroid hormone at birth. If not treated, it can lead to serious health problems.