I have the same unusual pain in my neck, back, and scalp. I have been having the problems since I was 17 years old and now I am 20. After going to numerous doctors, they related my electric like pain and head related pain to fibromyalgia. It's still hard to believe what the actual cause of it is for me. I have a twin sister who has not been diagnosed with POTS with the same symptom! It made me feel somewhat better to know someone else has these crazy symptoms I have.