What are hives? | Patient Explainers

Hives are itchy red or white bumps on the skin. This itchy rash is also known as urticaria, or as nettle rash. In some cases this itchy rash is triggered by a physical stimulus. If this is the case, the condition is called inducible urticaria or physical urticaria. Examples of physical factors which can trigger hives include pressure, friction, sweating, cold, heat, sunlight and water. Treatments include avoiding the trigger (where possible), and antihistamines. Urticaria can be called acute (short-lived episode) or chronic (persisting). Find out more: https://patient.info/health/hives-inducible-urticaria

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