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The same research also saw that for every 5 milimeter drop in mercury pressure, there was a 6 percent increase in headache risk. The effect, however, was observed not within a day but sometimes two or three days later.

New York, March 10: The risk of migraine can upsurge by 7.5 percent for every five degree Celsius increase in temperature, researchers from Beth Israel Deaconess Medical Center, who studied more than 7,000 patients over a 7-year period, revealed yesterday.

The study used weather records and air pollution readings from a monitor on the roof of the Countway Library of Medicine and matched them to headache diagnoses from emergency doctors.

According to their report, for temperature increase of 9 degrees Fahrenheit (5 degrees Celsius) in 24 hours, there was a 7.5 percent higher risk of severe headache.

Paris, France, January 13: Elderly people might suffer from elevated blood pressure during cold weather, thus putting them at a greater risk of stroke, heart attack or kidney failure, reveals a report from French researchers.

There is a significant rise in the rates of hypertension in the cooler months, says a report published in the Archives of Internal Medicine. Scientists have found a correlation between falling outdoor temperatures and rise in blood pressure among the elderly.