How is presentation of urticaria?

➢ Acute urticaria is most often a single episode and quickly resolving. No further examination is necessary. ➢ It is necessary to look for a triggering element in the hours preceding the eruption. ➢ Allergic urticaria and/or angioedema are rare, and always arise on a mode acute (rare cause of acute urticaria) and not chronic. ➢ All urticarias are acute initially. Some will become chronic after a period of time that is usually defined as 6 weeks or more. The condition is considered chronic hives (more common in adults) and recur frequently over months or years. ➢ The etiologic agent is more likely to be identified in acute urticaria (40-60%) than in chronic urticaria (10-20%). Cause of chronic urticaria can be similar to acute but includes also infections, hormonal disorder, autoimmune, tumors, unknown cause 90% more frequent in girl 70%