Urticaria, aka hives, is swelling of the upper (superficial) skin layer often caused by an allergic reaction which produces a rash of raised, red and/or flesh-coloured bumps (weals or welts) that can itch intensely, burn or sting.
Urticaria, aka hives, is swelling of the upper (superficial) skin layer often caused by an allergic reaction which produces a rash of raised, red and/or flesh-coloured bumps (weals or welts) that can itch intensely, burn or sting.