My electrical shocks and stinging were random, anywhere inside my skin. It felt like I imagine a cattle prod would feel. Like you doctors thought I looked fine. I do have a form of eczema Allergic Contact Dermatitis and after the 5 Day Extended Patch learned what to avoid, implementing contact control and the rashes healed. Yet this random stinging did not leave and kept getting worse. I thought I had nerve issues based on a neck injury decades earlier so I had a load of neurological testing, all that to learn I had carpal tunnel. Nothing else showed up. The stinging was worse at night as histamines are elevated in the evening. I was sleep deprived and was definitely loosing my mind, laying in bed at night planning the surest, cleanest and least painful way to commit suicide. I didn't want to fail or leave a mess for my husband to clean up. I had no memory of being pain free.I would have sold my soul to the devil have a hour of freedom from pain, simply to remember what it used to feel like. Sleep deprivation is a form of torture. I started on an annual Kenalog-40 corticosteroid shot and this was amazing and kept the electrical taser stings away for about 10 months, then it would slowing begin again. This went on for several years. Steroid shots in the long run are bad news. I finally bit the bullet and began an anti-inflammation diet, a real sacrifice-zero processed sugar and zero carbs for a 3 months detox then zero processed sugar for life, limited natural sugar like a piece of fruit 3- 4 days a week and safe carbs like rice, but zero gluten for life. I began this last Oct 2018 when the corticosteroid shot was wearing off and the stinging and zapping was starting up again. By Dec 1 when I normally had this shot I didn't need it! Now 13 months later and staying true to the Dr William Crook anti-inflammation diet, The Yeast Connection Handbook, I still am electrical shock free. This Dec will be 2 years since I required the potent and not so good for you corticosteroid shot.
All said your symptoms are different in that it is not an all day event. Yet originally mine were not either, this built up slowly over time. You are not crazy, this is really happening to you and you are smart for seeking info from others. I have, for now, solved my problem. The Dr. William Crook book is still sold today on Amazon, not expensive, a simple read. Easy hand written diagrams showing the influence of certain foods raising our histamines. This diet will not hurt you or cause negative side effects like the steroid shots and takes no prescription. Yet you must have the strength to follow it. Will power is a must. Now I never even think about sugar however that took at least 6 months of craving it. It's not easy, but if you are in enough pain you will be motivated to try anything that won't hurt you. I plan to eat like this for the rest of my life. Best of luck, I feel for you. Been there! Living life to the fullest now.