| urticaria papulosa | A sensitivity reaction to insect bites, especially human and pet fleas, seen mostly in young children as wheals followed by papules on exposed areas. Synonym: lichen urticatus, prurigo infantilis, urticaria papulosa. (05 Mar 2000) |
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| urticaria perstans | A form of chronic urticaria in which the wheals persist unchanged for long periods; includes urticarial vasculitis. (05 Mar 2000) |
| urticaria pigmentosa | The most common form of mastocytosis. It occurs primarily in children and is typically characterised by multiple persistent small, reddish-brown, hyperpigmented, pruritic macules and papules. They are located most commonly on the trunk, but seen also on the extremities, head, and neck. (12 Dec 1998) |
| urticaria subcutanea | Urticaria in which itching is present without the wheals. (05 Mar 2000) |
| urticaria tuberosa | A vascular reaction involving the deep dermis or subcutaneous or submucal tissues, representing localised oedema caused by dilatation and increased permeability of the capillaries and characterised by development of giant wheals. (18 Nov 1997) |
| urticaria vesiculosa | An eruption of wheals capped with subepidermal vesicles. Synonym: urticaria vesiculosa. (05 Mar 2000) |
| urticarial | Urticarious Relating to or marked by urticaria. (05 Mar 2000) |
| urticarial fever | Schistosomiasis caused by schistosoma japonicum. It is endemic in the far east and affects the bowel, liver, and spleen. (12 Dec 1998) |
| urticarial vasculitis | Cutaneous lesions resembling urticaria but lasting more than 24 hours, with biopsy findings of leukocytoclastic vasculitis and variable systemic changes, usually with hypocomplementemia. Synonym: hypocomplementemic vasculitis. (05 Mar 2000) |
| urticate | 1. To perform urtication. 2. Marked by the presence of wheals. Origin: L. Urticatus (05 Mar 2000) |
| urtication | <medicine> The act or process of whipping or stinging with nettles; sometimes used in the treatment of paralysis. Source: Websters Dictionary (01 Mar 1998) |