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 ...

A bug bite that looks like a bruise can come from spiders, hornets, wasps, mosquitos, and ticks. While red marks, welts, and itching are the most common symptoms of insect bites, bruising can also ...