Small, pale pink papules are surrounded by a prominent white halo of vasoconstriction, triggered by stress.
Presents as a deep, non-pitting, and often non-pruritic swelling of the lower dermis and subcutaneous tissues, commonly affecting the lips and eyelids.
Small (1-3 mm), highly pruritic, perifollicular wheals appear within minutes of contact with water, regardless of its temperature.
Numerous, highly pruritic, small (1-4 mm) punctate wheals surrounded by a prominent erythematous flare are induced by sweating.
A pruritic wheal and flare reaction develops on skin upon rewarming after direct exposure to a cold stimulus.
A wheal and flare reaction develops rapidly and is confined to the site of direct skin contact with an eliciting substance.
Deep, tender, erythematous swellings appear with a characteristic delay of several hours after sustained pressure has been applied to the skin.
A linear wheal with a surrounding flare appears within minutes along the path of a scratch or firm stroking of the skin.
Large, classic wheals (larger than cholinergic urticaria) develop during or after physical exertion and may be associated with anaphylaxis.
Burning maculopapular lesions (not true wheals) appear hours after generalized cold exposure and are accompanied by systemic symptoms like fever.
A localized wheal and flare reaction develops within minutes at the site of direct contact with a heat source.
Recurrent episodes of non-pitting, non-pruritic angioedema occur characteristically without any associated urticarial wheals.
A migratory, urticaria-like rash is a key feature alongside recurrent fevers, joint pain, and progressive sensorineural hearing loss.
A chronic, non-pruritic urticarial rash is characteristically associated with a monoclonal IgM gammopathy, fever, and bone pain.
A pruritic wheal and flare reaction develops within minutes of exposure to sunlight and is confined to the exposed areas.
Evanescent, pruritic wheals appear spontaneously without any identifiable external trigger and each lesion resolves within 24 hours.
Urticarial lesions are painful, persist for more than 24 hours, and often resolve leaving purpuric stains or hyperpigmentation.
Localized angioedema and erythema are rapidly induced at a site exposed to a vibratory stimulus.
