What happens to the eyes when a person is in REM sleep?

When you're dreaming, your eyes don't know you're asleep. Michael Timothy Smith, MA, PhD, director of the Behavioral Sleep Medicine Program at Johns Hopkins University, explains.

Changes in your vision may be signs of other medical conditions.

Desmoid tumors are noncancerous and do not metastasize, but they can invade nearby tissues and structures.

Kids' migraines are more common than you think—but one type of therapy is offering hope.

Get the facts and learn ways to cope with this life-changing disease.

The relationship between sleep and heart health may be a two-way street. Here’s what you need to know to improve both.