I am suffering from cervical spondylosis since 1 and half year of C4&C5 sections. Recently from past three months. I have been suffering from a headache on left side behind my eyes to the left side of neck to back of my neck. My both hands and legs frequently tingles and I get a intense pain in tip of my little finger to shoulders. I do smoke. Niw I am greatly worried about this one side headache. Please suggest me the reason and treatment.