Diabetes is not the reason of spondylitis but diabetes take some extra time to get recovered. You should consult a physiotherapist for treatment and stretching as well as strengthening exercises.he will surely get the relief. Precaution like -no driving/travelling,no manual exertion, no weightlifting, posture correction(sit tall), avoid prolonged sitting or neck bending,no cold exposure, use of a firm roll below neck while lying....and Get an X-ray done for better assessment(as sometimes accidents lead to some bony problems)