In this section
allergic cause for hives should be suspected if episodes are rare, short-lived
and occur under specific circumstances, for example:
Other causes are:
Assess for signs of anaphylaxis.
Erythematous raised skin lesion (Wheal)
If recurrent angioedema without wheals, think of
C1 esterase inhibitor
Blotchy rash typical of urticaria
Urticarial lesions with typical clear skin in centre.
These are not "target lesions"
How to distinguish? EM is:
Investigations: Usually not indicated for
Remove identifiable cause if any
Cetirizine (Zyrtec) 0.25mg/kg/dose (adult 10mg) 12-24H oral. Can give up to 4 times the recommended
dose to a maximum total daily dose of 40mg. Can be used in children from 6
months of age
requiring care beyond the comfort level of the hospital.
For emergency advice and
paediatric or neonatal ICU transfers, call the Paediatric Infant Perinatal
Emergency Retrieval (PIPER) Service: 1300 137 650
Most patients do not
need admission for urticaria
Parent Information Sheet (HTML version)
Last Updated January 2019