I have the same pain on the top of my head but to the right. I can produce the headache by pressing on the spot. I went to a neuro and he dx me with "ice pick" migraines. I am on Gabipentin and it has helped but I still get them. The cause is due to an artery that has narrowed.
Have you had an MRI of the head?
DX: Sarcoidosis, Addisons Disease, Renal Insufficiency, IBS, GERD, Hashimoto Thyroiditis, Degenerative Disc Disease, Autoimmune Hepatitis, Hypoglycemia, Secondary Raynauds, Erythema Nodosum, Migraines, Depression
RX: Effexor XR , Zebeta, Flonase ,ASA, Hydrochlothiazide, Hydrocortisone, Tramadol, Naproxen, Prevacid, Gabapentin, Levothroxine, Tricor, Actonel, Oxygen