> The insane thing is that if I get plenty of sun, like on a summer vacation my symptoms nearly disappear. A lot of people are having good results with red light therapy and it’s something I plan on trying.

There’s a known link between infrared and mitochondria via the ATP cycle. I was submitted to infrared therapy for 2 months after a fracture on the cheek damaged the nerve and left my face numb. I would say I recovered 95% of the sensitivity by now, can’t prove or disprove it was definitely the treatment, but nerve damage tends to not have a great prognosis.