hello sir, my dad is suffering from severe pain in the right side of the face,head right shoulder near medulla and also in the spinal.he says it feels as electric shocks.. the pain starts all of a sudden and is unbearable.. nothing gives him relief for seconds, minutes or sometimes even hours.. he consulted a number of doctors eye specialists, dentists, phycisians and many. he got treated for spondiolitis but it did not help. the problem continues and has increased in the past few months. we are very much worried please suggest us what to do.
Hello, Your father sounds to be suffering from a spinal nerve being compressed if the problem is clearly over the SAME half of the head and face and can last as you say for HOURS at a time.  He may be suffering from a CERVICAL NEURITIS. That's one possibility.  The other is that something in the brain could be causing this, so I would recommend obtaining an MRI of the brain with GADOLINIUM contrast to see if there could be something intracranial causing these intense pains such as a mass lesion affecting one of the sphenopalatiine ganglia which would give off the trigeminal nerve responsible for sensation of the face (on that side).  Also, imaging studies of the cervical cord may be necessary to look at the area of the spinal nucleus of the trigeminal nerve to see if that is being compromised in some way.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.