The good news is, dehydration is preventable in hot weather. This can lead to a rapid drop in blood pressure and extreme fatigue. This causes your brain tissue to lose moisture and shrink, which in turn causes bad headaches.ĭehydration can also impact blood flow through your blood vessels as water in the body decreases. Dehydration alone causes headaches in many, but it can also exacerbate other conditions, including migraines.ĭehydration occurs when your body lacks the right amount of fluid to supply the brain. DehydrationĪ heat headache may actually be a dehydration headache. It isn’t the heat causing your headache, but your body’s response to the hot weather. The heat may give you a headache because it has triggered a reaction to dehydration, a heat-related illness, or a migraine. Why does the heat give me a headache? Heat headaches are often symptomatic of other conditions in the body. Hot, sunny weather can boost serotonin levels and improve our overall mood while increasing our chance of developing headaches at the same time. Understanding both the causes and the warning signs of a heat headache can help you prevent and treat potentially dangerous heat-related conditions behind your pain. While many blame the hot weather itself for these types of headaches, there is typically an underlying cause for your head pain and other symptoms.ĭehydration and heat-related illnesses like heat exhaustion or heat stroke may play a part in your bad headache. Heat headaches and severe headaches like migraines are common in hot weather.
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