It can be distressing to wake up with a mysterious swollen red rash on your ankle. Could that rash be an insect bite? And what kind of bug bit you? The answers aren't so easy to figure out. Even for ...

Nobody likes bug bites, but people with papular urticaria have an especially good reason to hate them. Papular urticaria is a hypersensitivity to bug bites. The condition causes a bump or red welts on ...