Does anyone have Trigeminal neuralgia with vit b12 deficiency. I get excruciating facial pain on the right side of my face when I clean my upper right teeth. I have been self injecting every other day for over a year but recently cut it down to twice a week, should I go back SI every other day. I also have MS. I feel dizzy at times with shaky vision. Any advice will be greatly appreciated, thankyou.