4.7.1 Probable primary stabbing headache

A patient describes headache occurring as brief, sharp jabs around the right eyebrow, settling after roughly three minutes, which she times on her phone out of curiosity. She counts three such episodes on a typical day, usually clustering in the afternoon. She is adamant there is no tearing, no redness, no forehead sweating and no stuffy nose accompanying any jab, and there is no drooping of the eyelid. The character, she says, is unmistakably stabbing and piercing rather than a dull pressure, and she denies nausea, photophobia or phonophobia.