Hi, I believe that your best move (as I stated in my other response) is to see a neurologist who can perform a good Cranial nerves examination and determine whether this constant and now seemingly chronic pain which we might refer to as a paresthesia of some sort could be due to a peripheral cranial neuropathy or if something in the brain could still be responsible. For that, I would likely want to send you for an MRI with gadolinium contrast. Recall that MRI images are about 10x more sensitive for abnormalities than CT scans. The neurologist can also review the labs you had done to check that indeed the numbers are satisfactory and the types of testing obtained sufficient for your condition. The neurologist could then, decide to treat you either with medication or something else such as alternative non-pharmacological treatment options if appropriate. Options I consider in my patients who have chronic paresthetic pains in the face or head which are not due to identifiable organic causes would be things such as acupuncture, biofeedback, Transcutaneous nerve stimulation, thermal zone therapy, etc. Medications that may help to reduce your symptoms could be things such as gabapentin, pregabalin, carbamazepine, baclofen, lamotrigine, nortriptyline, and others. Again, the choice of drug and dosing are highly dependent upon what is found during the examination and also seen on any further imaging studies obtained and any further laboratory studies that may be obtained. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ivan R. Rommstein, General Surgeon