Itchy Rash, Red And Inflammef With Little Bumps All Over The Body. On Strict Diet. Can You Advise Remedy Without Medications?

Hi, I woke up with an itchy rash on my arms and legs after a night of sushi. The rash has since spread to most of my body. Everything is dark red and inflamed, and swollen, with little bumps- like chicken skin. I have been on a very strict clean diet with only organic meats, vegetables, fruits, nuts, seeds for a long time. I have many food sensitivities, but no known allergies. I have never broken out in rashes from any of them. I eliminated all fruit 3 months ago, to begin a candida cleanse, and have had amazing results. This was my first "off" meal. It has not responded to antihistamines. I started using vinegar to clean it, and the spreading has stopped. I am not a fan of medication, and do not have a doctor as after many years failed to have one give me a solution that didn't involve drugs.