Welcome in H.C.M.
I have gone through your query regarding pin at the base of head and back of neck, severe headache
, grinding in ears.
Your history of illness suggest us to think for-
1- Cervical spondylosis
2- Radiculopathy of cervical spinal nerve.
3- Meningeal irritation
These possibilities may be rule out by-
a- M.R.I. of brain and cervical spine.
b- C.S.F. examination.
Till the reports are awaited you may take-
1- Analgessic with muscle relaxant
2- Hot foamentation of neck.
I hope this will help you.