Great article from Readers Digest

Health How the Weather Forecast Predicts Your Health BY LAUREN GELMAN ILLUSTRATION BY MARK MILLER On cold days, watch for: Heart attack: One 2012 U.S. study found an 18 percent increase in heart attack deaths in winter and a 10 to 12 percent decrease in summer. Cold weather may constrict blood vessels or lead to more blood clots. Psoriasis flares: Cold, dry air sucks moisture out of the skin, which makes it more vulnerable to the disease's trademark red, scaly patches. A good, greasy, penetrating moisturizer can help. On hot days, watch for: Gout: Dehydration from sweltering temps can cause uric acid, a trigger of gout pain, to accumulate. Multiple sclerosis: Steamy weather and even slight rises in core body temperature-caused by a fever or taking a hot bath-can exacerbate symptoms. When lightning strikes, watch for: Migraines: A study found that these headaches were 28 percent more likely to occur when lightning struck, perhaps due to electromagnetic changes. On rainy days, watch for: Arthritis: As atmospheric pressure drops, tissues near joints expand and put pressure on nerves. (However, some studies that tracked symptoms with weather didn't find a strong link.)