rellbabe- What type of allergy testing? About 5 years before these sensations started I had the 5 Day Extending Patch Test for Allergic Contact Dermatitis, ACD, because of itchy external rashes. All my itchy rash issues were eliminated because the test identified dozen of allergens, which of course means avoiding a hundred plus contacts.
Forgive me for repeating what worked for me, going on 5 years now, was reading The Yeast Connection Handbook by William Crook, MD. It saved my life. His brutal detox includes many foods I've been able to reintroduce without having a relapse, yet I still totally avoid processed sugar.
Antihistamines are only a treatment. They do not stop the cause of ACD or these internally skin symptoms. From reading this blog you realize there are many different causes of internal stinging, and zapping. Some have identified spinal issues. Sixty years ago in a car accident before seat belts I hit and cracked the windshield which resulted in 3 tilted discs in my neck. Eliminating processed sugar ending this internal misery, so it has nothing to do with my neck/spine.
If you are desparate like I was, you will find the strength to try this simple dietary solution. I'm not saying this is your answer, but it's worth a try. To begin with I followed the detox to the letter. His plan called for the detox to last 2 months, which I extended to 3 months because after 6 weeks I was definately noticing improvement. After that there is a maintanence plan I followed religiously then slowing added natural sugar in fruit and gluten overtime without any side effects.
If you havn't already, read this old blog from the beginning for other ideas. I hoping you and others find relief.