A pimple on the body when scratched may be a symptom of hives. The symptoms of urticaria, especially chronic urticaria, are localized oedematous erythema or limited wind masses on the skin after scratching with external force or fingers. The shape of the formation of some wind masses and the shape of the external force is the same, such as scratching into a strip, then the wind mass is also a kind of long strip, so this may be the symptoms of urticaria, and is artificial urticaria. It is a type of chronic urticaria.