31 Strange Causes of Headaches That Have Nothing to Do With Dehydration

Lisette Marie

24. Getting Overheated

Tired Middle eastern man sitting on bench relaxing in park. Hot weather. Photo Credit: Envato @msvyatkovska

While dehydration often accompanies heat, overheating itself can trigger headaches. When your body temperature rises significantly—whether from intense exercise, hot weather, or a stuffy room—blood vessels in your head can dilate to help release heat. This vasodilation can lead to a throbbing headache for some individuals. Staying cool by using fans, wearing light clothing, seeking shade, applying cool compresses to your neck or forehead, and avoiding strenuous activity during peak heat can help prevent these heat-induced headaches.

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24. Getting Overheated

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