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Urticaria, also known as hives, is a very common clinical presentation characterized by transient (<12 hours), itchy dermal wheals. Angioedema is defined as subcutaneous or mucosal (often of the lips) swelling that is episodic and recurrent; it may occur alone or in>... Differential Diagnosis ... Workup and Diagnosis ... Treatment
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Drug-induced urticaria is the most common form of urticaria in children; anaphylaxis and hereditary angioedema are life-threatening conditions; remember ABCs of resuscitation (airway, breathing, circulation); best treatment is prevention; that is, avoidance... Differential Diagnosis ... Workup and Diagnosis ... Treatment
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... Urticaria is a vascular skin reaction characterized by the eruption of transient pruritic wheals — smooth, slightly elevated patches with well-defined erythematous margins and pale centers of various shapes and sizes. It’s produced by the local release of histamine or... Emergency interventions ... History ... Medical causes ... Other causes ... Special considerations ... Pediatric pointers
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... Specific antigen sensitivity (e.g., foods, food additives, Hymenoptera venom)
Physical agents
Pressure, mechanical irritation, vibratory, water (aquagenic)
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... Signs and Symptoms After exposure to an antigen, feeling of impending doom, weakness, sneezing, wheezing, dyspnea, urticaria, respiratory distress, abdominal cramping, hypotension, shock
Treatment (Tx) ... Pictures
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... Allergic purpura, a nonthrombocytopenic purpura, is an acute or chronic vascular inflammation affecting the skin, joints, and GI and genitourinary (GU) tracts, in association with allergy symptoms. When allergic purpura primarily affects the GI tract, with accompanying... Causes and incidence ... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations ... Pictures
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... Allergic rhinitis is a reaction to airborne (inhaled) allergens. Depending on the allergen, the resulting rhinitis and conjunctivitis may occur seasonally (hay fever) or year-round (perennial allergic rhinitis).
... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations
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... Latex is a substance found in an increasing number of products both on the job and in the home environment. Also increasing is the number of latex allergies. Latex allergy is a hypersensitivity reaction to products that contain natural latex, which is derived from the... Causes and incidence ... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations ... Pictures
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... Urticaria, commonly known as hives, is an episodic, usually self-limited skin reaction characterized by local dermal wheals surrounded by an erythematous flare. Angioedema is a subcutaneous and dermal eruption that produces deeper, larger wheals (usually on the hands, feet, lips,... Causes and incidence ... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations ... Pictures
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... Urticaria is a vascular skin reaction characterized by the eruption of transient pruritic wheals—smooth, slightly elevated patches with well-defined erythematous margins and pale centers of various shapes and sizes. This reaction is caused by the local... Emergency Interventions ... History ... Medical causes ... Other causes ... Special considerations ... Pediatric pointers
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... Rachelle L. Cassity
Urticaria (hives) is a common condition. The lesions appear well circumscribed. Typically, they are first erythematous and subsequently develop a central wheal. They usually clear within 3 to 4 hours, and the... Approach ... History ... Physical examination ... Testing ... Diagnostic assessment
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... Differential Overview
❑ Ingestants
❑ Drugs
❑ Inhalants
❑ Hymenoptera venom
&... Diagnostic Approach ... Clinical Findings
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... Anaphylaxis is a dramatic and widespread acute atopic reaction marked by the sudden onset of rapidly progressive urticaria and respiratory distress. A severe anaphylactic reaction may precipitate vascular collapse, leading to systemic shock and, sometimes, death. ... Causes ... Signs and symptoms ... Diagnosis ... Treatment and special considerations ... Pictures
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... Allergic purpura, or anaphylactoid purpura, is a type of nonthrombocytopenic purpura. It’s characterized by allergy symptoms and acute or chronic vascular inflammation affecting the skin, joints, or GI or genitourinary (GU) tract. When allergic... Causes ... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations
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... An immune disorder, allergic rhinitis is a reaction to airborne (inhaled) allergens. Depending on the allergen, the resulting rhinitis and conjunctivitis may be seasonal (hay fever) or year-round (perennial allergic rhinitis). Allergic rhinitis... Causes ... Signs and symptoms ... Diagnosis ... Treatment ... Special considerations ... Pictures
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... Urticaria, commonly known as hives, is an episodic, usually self-limited skin reaction characterized by local dermal wheals surrounded by an erythematous flare. Angioedema, which can present either subcutaneously or dermally, produces deeper, larger wheals (usually on... Causes ... Signs and symptoms ... Diagnosis ... Treatment
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... Urticaria is a vascular skin reaction characterized by the eruption of transient pruritic wheals — smooth, slightly elevated patches with well-defined erythematous margins and pale centers of various shapes and sizes (hives). It’s produced by the local release of... Assessment ... History ... Physical examination ... Pediatric pointers ... Medical causes ... Other causes ... Nursing considerations ... Patient teaching ... Pictures
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... Urticaria, also known as hives, is a vascular skin reaction characterized by the eruption of transient pruritic wheals — smooth, slightly elevated patches with well-defined erythematous margins and pale centers of various shapes and sizes. It’s produced by... Emergency Actions ... History ... Physical assessment ... Medical causes ... Other causes ... Special considerations ... Pediatric pointers ... Patient counseling ... Pictures
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... Urticaria is a vascular skin reaction characterized by the eruption of transient pruritic wheals—smooth, slightly elevated patches with well-defined erythematous margins and pale centers of various shapes and sizes. It's produced by the local... History and physical examination ... Medical causes ... Other causes ... Nursing considerations ... Patient teaching
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... Author:
Craig DeWolfe, MD
What to Do - Gather Appropriate Data
A previous reaction to seafood, povidone iodine, or other iodine-containing
substance does not have any predictive value beyond a reaction to contrast material. The practitioner may also counsel the... Suggested Readings
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