Causes of Urticaria
Acute urticaria | |
---|---|
IgE mediated | For example food allergy, drugs, latex |
Drugs | For example betalactam antibiotics, NSAIDs |
Infection | |
Idiopathic | |
Chronic urticaria | |
Inducible (physical) urticaria | For example cold, exercise, solar, pressure, delayed vibration, aquagenic |
Chronic infection | For example H. pylori, cholecystitis, parasitic infestation, hepatitis B and C, dental caries and gingivitis |
Autoimmune | Antibody directed at FcϵR1α or IgE on mast cells Thyroid autoimmunity (patient usually euthyroid) |
Stress | |
Miscellaneous | Urticaria pigmentosa CAPS (cryopyrin-associated autoinflammatory syndrome) Dietary pseudoallergens |
Spontaneous (idiopathic) |