Rising temperatures may trigger headaches
The analysis indicated that higher temperatures and lower barometric pressure increased the risk of headache. For every 5°C (9°F) jump in temperature, headache risk rose by 7.5%. Air pollution levels, however, had no influence, although other studies have linked air pollution to stroke, heart attack, and other health problems.
“Higher ambient temperature and, to a lesser degree, lower barometric pressure led to a transient increase in risk of headache requiring emergency department evaluation,” conclude the authors. “We did not find clear association of air pollutants with risk, but cannot exclude effects of air pollution of the magnitude previously observed for stroke and other cardiovascular events” (Neurology. 2009;72:922-927).