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When a nerve in the ball of the foot becomes pinched, it swells and becomes painful. The painful, swollen nerve is called a neuroma.

Magnetic resonance imaging (MRI) is a test that lets your doctor see detailed pictures of the inside of your body. MRI combines the use of strong magnets and radio waves to form an MRI image. Read on to learn all about having an MRI. 

Metatarsalgia is pain in the ball of your foot. It's often caused by poorly fitting shoes. Learn the symptoms.

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.

A helpful, step-by-step guide to doing a monthly skin check and tracking any changes in your moles.

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.