Research consistently finds that strokes cluster in the morning, roughly between 6 a.m. and noon, rather than spreading evenly across the 24-hour day
A meta-analysis of 11,816 strokes and a systematic review of 58 studies both linked this window to higher stroke onset across ischemic, hemorrhagic, and transient ischemic attacks
Scientists attribute the pattern largely to normal circadian shifts, including the blood pressure surge on waking and morning changes that make the blood more prone to clotting
Strokes that begin overnight are often recognized late and have been associated with greater severity, which makes knowing the sudden warning signs especially useful
Experts describe stroke as largely preventable, and everyday habits around movement, sleep, stress, drinks, alcohol, and tobacco are linked to a lower risk
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