Hello cervical pain family. :H PM Dr gave me a TENS unit. I applied one to the back/rt side of my neck at about c/3 and one on my rt shoulder. Very little stimulation level ("3") caused my shoulder to twitch and jump, I felt slight pain at my neck. The manual doesn't have info about putting it up that high on one's neck, so I'm wondering about that. One day llater my pain and stiffness is off the charts. Two days later same, with bad sore throat. Is it a bug or is it the TENS unit caused this and should not be used for the neck? :??