Urticaria other diagnostic studies

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Other Diagnostic Studies

Urticaria Activity Score

Urticaria activity score (UAS7) is a scoring system, which is helpful for evaluation of spontaneous urticaria severity. It is a questionnaire-based system which mainly inquire about pruritus and wheals experienced by the patients.
! style="width: 200px; background: #4479BA;" | Score ! style="width: 300px; background: #4479BA;" | Wheals ! style="width: 400px; background: #4479BA;" | Pruritus |- | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | 0 | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | No wheals have been appeared | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Patient didn't experience any pruritus |- | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | 1 | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Appearance of less than 20 wheals within 24 hours | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Patient experienced pruritus, nevertheless it didn't annoy the patient |- | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | 2 | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Appearance of 20 to 50 wheals within 24 hours | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Patient felt annoyed with pruritus, nevertheless it didn't interfere with him/her daily activities or sleep |- | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | 3 | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Appearance of more than 50 wheals within 24 hours or involvement of a large surface of body with confluent wheals | style="padding: 0 5px; background: #F5F5F5; text-align: left;" | Patient felt annoyed with pruritus and it interferes with him/her daily activities or sleep |- |}

Ice Cube Test

Ice cube test is recommended as a diagnostic test in order to diagnose cold-induced urticaria. This test is performed by applying a plastic bag containing melting ice cubes on the patient's forearm for 5 minutes. Appearance of wheal within 10 minutes after removing the plastic bag is considered a positive test.