Sudden sweating of the face and especially behind the ears may indicate a serious medical condition. It could be caused by excessive amounts of calcium in your blood, or it can be an allergic reaction to something you ate. If you sweat profusely during exercise, it is more likely that this means that you are having trouble getting enough oxygen into your body. This is called hypoxia (pronounced hy-POX-ee-uh).
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A sudden muscle spasm may cause facial sweating. This occurs when someone suddenly contracts his muscles without giving them time to relax again after they have been used for some time—for example, when he tightens his leg muscles while running down stairs or before jumping off a diving board. He becomes short of breath because these involuntary contractions prevent him from breathing out all the air in his lungs at once; instead, each successive beat of his heart pushes air into one lung at a time until he has filled both lungs completely with air. Then he must force himself not to use any more strength, so he needs extra energy just to keep going!
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WHAT IS HYPOGLYCEMIA? HOW DOES IT AFFECT THE BODY? WHAT CAUSES IT? WHY DOES IT OCCUR IN SOME PEOPLE AND NOT OTHER PEOPLE? CAN YOU PREVENT ITS EFFECTS FROM HAPPENING TO YOU? WHEN AND WHERE DID THIS CONDITION ORIGIN