Feeling a little itchy? Here's how to recognize the most commonly undiagnosed skin irritations, including the one you may ...

The first signs of a black widow spider bite are usually a pinprick sensation, minor swelling, redness and a target-shaped sore, Medline Plus explains. Within 15 minutes to an hour of getting the bite ...

Walking, or atypical, pneumonia, is a mild form of pneumonia that often resembles a cold. You may not have a high fever and ...