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Learn how metatarsalgia, pain in the ball of your foot, is treated.

Narcolepsy is a sleep disorder that affects how your brain controls your sleep-wake cycles. The main symptom is being very sleepy during the day.

Narcolepsy is a serious sleep disorder. Find out about treatment and how to live with this condition.

Learn about foods that can raise your cholesterol and foods that can help you lower it.

The middle ear is an air-filled chamber that lies behind the eardrum. Pressure in the middle ear changes to match air pressure outside of the eardrum. When inside and outside pressures are balanced, the eardrum is flexible and normal hearing is more likely. Problems happen when air pressure in the middle ear drops. This is often due to a block in the eustachian (u-STA-shun) tube, the narrow channel connecting the ear with the back of the throat.

Oral lesions are abnormal cell growths or cell changes in or around the mouth that may become cancer. These lesions need to be found early to give you a better chance for a cure.

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.

Nonstress and contraction stress tests check if your baby is getting enough oxygen and nutrients from your blood. Here's what to expect.

If your child's testicle doesn't descend on its own, it should be treated to prevent future problems. Surgery is done to bring an undescended testicle into the normal position within the scrotum. Learn more about why surgery is needed and what you can expect when your child has it done.