I Am 58 Yo Male. Have Had 3 Back Surgeries

I am 58 yo male. Have had 3 back surgeries last one 12/16/14. In April 2015, I started having feelings like fingers moving between my eyebrows. The it gets worse going up my forehead and progress to the top of my scalp to the back 1/3 of my head. It goes numb and painful. It gets worse anytime I eat or even take a pill. I've been to many neurologist and headache specialist. No one know what's going on. MRAs, MRIs, Pet Scans, EMGs, blood tests show nothing.