What causes pain/tenderness on eyebrows, especially when pressed? in addition, i tend to feel pain/tenderness on my temples from time to time.

Some thoughts...: This may simply be myofascial pain (tenderness in muscles of unknown cause), but a more important condition should be ruled out: Giant Cell Arteritis.This is an auto-immune inflammatory condition affecting blood vessels (most commonly, branches of the external carotid artery). If not treated, it can lead to loss of vision. The workup includes a focused exam and history, labs, and possibly biopsy.