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Ringworm is a type of skin infection cause by a fungus. Learn more about this condition, including cause, symptoms, diagnosis, and treatment.

RSV is a viral illness that causes symptoms such as trouble breathing. It’s the most common cause of inflammation of the small airways in the lungs (bronchiolitis) and pneumonia in babies.

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.

2019 Novel Coronavirus (2019-nCoV), also known as COVID-19, is a virus that causes a respiratory illness. Here's what you need to know to protect yourself.

This test looks for tetanus antibody in your blood. If you have been vaccinated for tetanus in the past, this test should show that you have enough antibodies against the disease.

This test measures 2 types of insulin in your body: total and free. The test can help diagnose low blood sugar, or hypoglycemia.

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.