Thanks for your query.
From the sketchy details provided, your patient has either Cervical spondylosis
or Vitamin B12/Thiamine deficiency
If your patient has been consuming alcohol since long, high doses of B12 + Thiamine for 2-3 months will improve his problem.
Get an X-ray of Cervical spine
done to exclude/confirm cervical spondylosis.
Hope I have answered your query.
Dr. Rakesh Karanwal