Doctors and researches are not fully sure why temperature influences headaches, but they discovered in a recent study that temperature and pressure give people sever headaches.

“I think it’s more complicated than that,” said Dr. Joel Saper, director of the Michigan Head Pain and Neurological Institute in Ann Arbor, Michigan, who was not involved in the study. Temperature and pressure may be indirect evidence of other causal factors.

The study was conducted at Beth Israel Deaconess Medical Center in Boston, Massachusetts on over 7,000 patient’s who came to the emergency room and discharged with a primary diagnosis of some kind of headache. According to the source, 75% of these patients were women.

The study concluded that the risk of severe headache increases about 7.5 percent for each temperature increment of 5 degrees Celsius.

The best advice, stay cool on a hot day.

Source – CNN.com