Urticaria is a rash that is frequently labeled as “hives.” This rash appears as an eruption of pale bumps, splotchy elevated or raised patches, or even welt-like bumps. They seem to appear almost overnight or without any advance warning. They are frequently accompanied by extreme itchiness in the raised or swollen areas, and when hives are especially intense, they can create plaques across a person’s body that can cover much larger regions of skin.