Headache can also be a consequence of a more generalized medical condition, and these headaches are listed below under Systemic problems . Mouth and throat. Eye strain due to uncorrected or poorly-corrected vision problems, acute glaucoma, infection or inflammation. Intermittent brief, sharp and severe pains suggest a cranial nerve neuralgia syndrome such as trigeminal neuralgia. Headaches of unclear origin.
Headaches related to cough, exercise, or sexual activity are similarly of unclear origin.
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