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If you wake up often during the night with an urgent need to pee (urinate), you may have nocturia. This condition can affect anyone. But it is more likely to occur as you get older.

Gazing down on the spectacular view from a mountaintop can take your breath away. That breathlessness is oftentimes more than just an awestruck reaction to the sights. It can be a symptom of altitude sickness, an illness that can strike hikers, mountain climbers, skiers and anyone who hits the 8,000-foot mark on a mountain.

Although millions of Americans have balanced disorders, they can be difficult to diagnose. That's because dizziness--a common symptom--is such a broad term.

Botulism is rare, but extremely dangerous. This quiz will help you learn how to make sure the food you eat is safe.

Aplastic anemia is a rare blood disorder that affects the growth of blood cells. "Aplastic" means "lack of growth."

Each year, more than a million Americans die of heart attacks and other forms of heart disease. Low-dose aspirin therapy is one weapon in the arsenal against heart disease that also includes healthy dieting, adequate exercise, and not smoking. Learn more about aspirin's role in combating heart disease by taking this quiz

Find out how much you know about asthma basics with this quiz.

When you have diabetes, you are at greater risk for periodontal disease. This disease is an infection of the gums and tissues supporting the teeth. Any periodontal disease you may develop can be more severe and harder to control. Preventing or controlling periodontal disease needs ongoing care.

Laser therapy can be used to cut a very tiny area to remove very small cancers without damaging surrounding tissue. Lasers also are used to apply heat to tumors to shrink them. They are sometimes used with medicines that are activated by laser light to kill cancer cells.