63 yr old male. Vertebrae hurts to the touch at back of neck. Pain and occasional numbness in left arm and hand. Headache in the back of lower head.

Evaluation needed. But you already knew that. I would recommend seeing your regular doctor, getting an xray of your neck. You will likely also need a few more tests including an MRI and emg/ncs. This will help understand whether you have a herniated disc, and pinched nerve. Good luck!
Radiculopathy. You need to be seen by your physician. Risk for nerve damage. Get an appt.