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.

Open surgery may be done before, after, or instead of other treatments. This is usually done if the stone is very large, if you have a serious infection, or the kidney has blockage even after waiting for a while.

Percutaneous nephrolithotomy may be done before, after, or instead of other treatments. If you need this procedure, your doctor will discuss its risks and possible complications.

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.

In some cases, your doctor may prescribe medications to dissolve or prevent stones. Or medications may be prescribed to stop an infection. Once the infection is controlled, your stone can be removed.

Most kidney stones are about the size of a grape seed. Stones of this size are small enough to pass naturally. Once it is passed, a stone can be analyzed. This wait-and-see approach is called expectant therapy.

Your bridge depends on the health of supporting teeth and gums. Always clean your bridge and the rest of your mouth carefully. Read on for details.

Read on to learn about sensitive teeth.

Most headaches aren't serious and can be relieved with self-care. But some headaches may be a sign of another health problem like eye trouble or high blood pressure. To find the best treatment, learn what kind of headaches you get.