Pain In Left Ear Cause I'm Losing Range Of Motion In My Neck, Turning Left Causes Pain Under Skull Behind Let Ear. What Can I Do?

I'm losing range of motion in my neck, turning left causes pain under skull behind let ear. What can I do? - pain in left ear cause

I was told that I suffer from degenerative arthritis in the neck. Use glucosomine / MSM what can I do to relieve the pain and full movement again.