I'm 6'2", 230lb, and 61 years old. Up until my late 40's, I never had a problem with sweating. Despite being very active, I only sweat mildly, even under severe and extended exertion. Then, over a very short period (months) things changed and sweating became a serious issue, where I began to sweat more and more at ever less and less exertion until now, I sweat profusely at even the slightest exertion. I'm worried this may be a symptom of impending heart problems or something equally serious--or am I "just getting old"?

Please advise, what could have caused and continues to aggravate this condition?