If you've ever thought the weather has caused your headache, you're not alone, and now researchers say there might be something scientific to that theory.
A new study published in the journal Neurology finds a link between temperature and severe headaches.
Researchers at Beth Israel Deaconess Medical Center looked at the cases of more than 7,000 patients who came into the emergency room with headaches.
They then found out what the weather was doing in the days before the hospital visit.
"It was consistently warmer on the days that individuals came in with headaches than on similar days of month," explained R. Kenneth Mukamal.
They found the risk of getting a headache was about 7.5 percent higher for every nine degree increase in temperature.
It was true in both summer and winter.
"There is clearly things going on in our autonomic nervous system, and that part of our nervous system that affects regulates our internal organs," said Dr. Mukamal.
Researchers also found slightly lower pressure in the atmosphere on days before some hospitalizations, though they found pollution in the air seemed to have no effect on headaches.
They say more research is needed, but this should give headache sufferers something to think about when trying to figure out what triggers their pain, and could eventually lead to a dose of preventative medicine if the forecast calls for a warm up.
The study only looked at people with headaches bad enough that they went to the hospital.