How do you reassure families that no allergy testing is needed for urticaria?  

There used to be a Choosing Wisely message about this. Here is a video on it. Diagnostic Testing and Chronic Urticaria Video - AAAAI The 2014 practice parameters on chronic urticaria also discuss this. The practice parameter update is looking at this in a GRADE fashion and will likely have ev...

I explain to them that it is an immunologic phenomenon (inside job) and not allergic (outside job).