Isolated pain in a single spot on the left side of my head. It is near the back of my head and the upper side of my left side. Throbbing pain.

Occipital neuralgia. Irritation of the main nerve that runs from the back of the skull can cause occipital neuralgia. . It is suspected that tense muscles or ligaments may press against the nerve, causing irritation, inflammation and subsequent pain. Other causes may include viral infection, trauma to the neck or bad posture.