Learn symptoms of an armpit rash, what causes it, how it’s diagnosed ... causing a heat rash. Friction dermatitis is a common rash. The friction created by skin rubbing on skin or clothing ...

It can also happen in other parts of your body, including your hands. In some cases, we know what causes the muscular walls of the artery to contract. Other times, it's a mystery. What is a vasospasm?

Cardiac arrest can be fatal if not treated immediately. Because complete heart block causes the heart to work harder to pump blood, one complication is heart failure, a chronic weakening of the ...