I am a 68 yr old female. Good health til 4 month ago. Had a tetnus shot and six stiches in my forehead. Same time started with severe headaches and then tingling & burning at bottom of feet and and over 3 days went up to my head, mouth and tongue. I've had MRI (nothing) PET scan (nothing) numerous blood tests. Seen a neurologist, dermotologist, allergest and my PCP. No diagnosis yet. Very, very frustrating.