 [ Symptoms ] stage 4 anal cancer left radiation neuritis of sciatic nerve now in pain [ Disease ] hi i have this too and my doctor said it was due to a thinning disk in your neck vertebre and it was pinching a nerve she said nothing can be done cause it was from me having ra and just old age im 54 i hope you get help with this i know its painful and i cant even sleep sometimes the pain meds dont work tamara