I thought it was just another doggy health forum. LOL
Anything used inappropriately will cause unintended results, and this includes "alternative" remedies. IMHO alternative therapies have their place as supportive therapy, or possibly preventative therapy.
In your case bathing the dog, and sealing the open sores with aloe preventing direct air contact probably does relieve some of the itching. Although repeated bathing might make the skin dry.
What of the allergy? Should one try Quercetin for immediate relief? That depends on your definition of relief. This herb may serve as a daily supplement to head off allergic reactions, but is it potent enough to sop up a lot of histamine already released?
It would seem a short course of Antibiotics , and anti-histamines would be needed to get things under control. After which the alternative care could act as a preventative for reoccurance. There's a place for both.