From: Urticaria: recommendations from the Italian Society of Allergology, Asthma and Clinical Immunology and the Italian Society of Allergological, Occupational and Environmental Dermatology
Type of urticaria
Causative agent
Allergic
Foods, drugs, Hymenoptera stings
Spontaneous urticaria
Unknown
Inducible urticaria
Dermographism
Cold
Heat
Sunlight
Pressure
Vibration
Contact
Colinergic
Aquagenic