Headaches are extremely common, affecting two to four percent of the world’s population. The causes are complex, and waking up with a headache introduces new variables. More often than not, people ignore or fail to report morning headaches because getting on with the busy day is more important.


1. Nighttime Teeth Grinding

During sleep, some people grind their teeth, a condition called bruxism. With the help of polysomnography, researchers can firmly link sleep-related bruxism and waking up with a headache. One case showed that teeth-grinding resulted in problems with the individual's temporomandibular joint, resulting in bilateral, pulsing morning headaches that went on for years.

grinding teeth bruxism TMJ headaches Pornpak Khunatorn / Getty Images

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