What does tingling and numbness in left arm mean?
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It's a symptom of a Heart Attack

Call 911

I graduated an EMT-B class last year, and I learned that any kind of numbness or tingling in any extremities would indicate a possible stroke or T.I.A., ( Transient Ischemic Attack or a "mini-stroke"). A heart attack would cause PAIN extending from your chest into either arm and also possibly into your back. Although different people may have symptoms contrary to the typical ones you hear or read about. In any case, the above retort is the best action, better safe than sorry.

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