Urticaria is characterised by very itchy weals (hives), with or without surrounding erythematous flares.Urticaria can co-exist with angioedema which is a deeper swelling within the skin or mucous membranes. Urticaria is classified according to its duration. -Acute urticaria (< 6 weeks duration, and often gone within hours to days) -Chronic urticaria (> 6 weeks duration, with daily or episodic weals) Urticaria can affect any site of the body and tends to be distributed widely. The main treatment of all forms of urticaria in adults and children is with an oral second-generation H1-antihistamine such as cetirizine or loratidine.