What is the weather hot headache?

Cranial blood flow changes in hot weather show headache is more common, mainly because of the following points: the first reason, the weather is relatively hot, the body in order to dissipate heat, blood vessels are dilated state, so intracranial extracranial arteries are also in a state of expansion, so into the brain blood flow changes, so it can show headache attack, these patients into a relatively cool environment, headache normal can be relieved. The 2nd kind of reason, the weather is hot sweat is more, can cause the loss of electrolyte, show the disorder of inside environment, inside environment occurrence disorder is likely to induce migraine attack. The 3rd kind of reason, the weather is hot cause heatstroke, can cause cerebral edema, this also is the cause of headache.