Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Cold urticaria ?
    ### Response:
    Cold urticaria is a condition that affects the skin. Signs and symptoms generally include reddish, itchy welts (hives) and/or swelling when skin is exposed to the cold (i.e. cold weather or swimming in cold water). This rash is usually apparent within 2-5 minutes after exposure and can last for 1-2 hours.
    