Hives are a type of rash that results from an allergic reaction, insect bite, infection, and more. You can identify hives by pressing down on the bump — if it turns white, it's a hive.

What does a stress rash look like? A stress rash usually appears as raised red bumps called hives, says Niket Sonpal, MD, adjunct assistant professor at the Touro College of Osteopathic Medicine.