2.2 Frequent episodic tension-type headache

A 38-year-old machine operator describes repeated absences linked to headache. She has carried this pattern for more than a year, with pain gripping both sides of her head at once. Intensity stays mild to moderate throughout, and she manages to keep operating her machine during milder spells. Episodes last from roughly forty-five minutes up to a few days on her worst runs before easing completely. Nausea does not feature and she has never been sick with an attack. She notices no bother from light and no particular irritation from the factory noise either during an episode. Her records show 179 headache days across the last year, settling into about 13 headache days a month over the current four-month stretch, and she counts at least ten episodes in total.