What causes a headache in the same spot in an eye?

Many possible causes: There are many possible causes for these symptoms, ranging from sinus inflammation, iritis, migraine headaches, temporal arteritis, cluster headaches, among others. Affected individual should be examined by an ophthalmologist to rule-out eye-related causes, and perhaps by a neurologist, or neuro-ophthalmologist, if the eye exam fails to provide an explanation for the symptoms.

Headaches: Headaches could be coming from tension, eye strain, tooth grinding, dehydration, lack of sleep/poor sleep, skipping meals, stress, sleep apnea/snoring, or chronic sinus problems.