Sharp pain on left side (on top) of head-radiates around left eye and left ear?

Have it checked out!: While scalp sensitivity radiating toward an eye or ear may seem benign, some possibilities are more risky and deserve a check up. Particularly, if there is a possibility of early shingles (a zoster virus flare) or a process called giant cell arteritis (or temporal arteritis) then time is of the essence. This is especially true with any changes in vision. Follow up with your primary or eye md.

5th nerve: Another possibility is neuralgia, which is pain of unknown origin along a nerve.