Acute Urticaria

Acute urticaria is transient pruritic erythematous wheals/angioedema lasting <6 weeks, often from food/drug/infection/viral illness, in children/adults. Treatment: identify/avoid trigger; H1 antihistamines (second-generation: cetirizine/fexofenadine/loratadine); systemic corticosteroids for severe/extensive; epinephrine auto-injector for anaphylaxis/angioedema of airway; treat underlying infection; cool compresses; monitor for progression to anaphylaxis; follow-up allergy/dermatology/emergency.

Common Symptoms

Pruritic erythematous wheals; angioedema; <6 weeks; by food/drug/infection

Causes and Pathogenesis

IgE-mediated or direct mast-cell degranulation causes transient wheals.

Treatment

Antihistamines; avoid trigger; systemic steroids if severe; epinephrine for anaphylaxis

Preventive Measures

Avoid known triggers; carry epinephrine if history of anaphylaxis.

Department to Visit

It is recommended to visit the Allergy/Dermatology/Emergency department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.