★★★★★
The dermatologist was useless. What worked for me was apple cider vinegar, activated charcoal capsules, and coconut oil. I also used supplements of DAO Histaminase and Quercetin. Cold ice packs on the affected skin followed with coconut oil helps reduce the itching.
It is my belief that hives isn't caused by a particular food or substance per se. Rather, these things function as a trigger to an overloaded immune system that is dealing with a lot of toxins in the body. I am 67 and have had time to accumulate a lot of toxins. As the charcoal and ACV cleaned out the toxins, the rash and itching went away.
Detox will be a regular practice for me from now on.