What is urticaria?
The triple response:
1) Vasodilation erythema
2) Increased vascular permeability wheal
3) Axon reflex flare
Patients develop linear wheals at the site of stroking the skin – may have intense itching.
Linear raised red lines after scratching
More common in third trimester of pregnancy
Aetiology – foods, drugs, viral infections, bites, stings
Characteristically have itchy red raised pink plaques with no scales that are in a different place each day
ACE inhibitors, NSAID’s, aspirin should be avoided as can exacerbated
Urticaria develops after exposure to cold
Lesions develops on fingers after cold exposure
Also can get swelling of head, face and ears – get a feeling of “fullness” of the throat