Many things: Asthma tends to be worse at night but you will have to be very short of breath to get a heart rate this fast. You need to see your doctor to get a check up which may include evaluation of your lungs, heart, and thyroid status. If you were female, i would be more concerned with anemia.
Answered 12/20/2013
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7 doctors weighed in across 2 answers
7 doctors weighed in across 2 answers
A doctor has provided 1 answer
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