What could be the reason that I have an elevated heart rate. My blood pressure would be normal and my heart rate is in the 90's.

See a physician. Sometimes chronic stress, dehydration, infection and anxiety can cause rapid heart rate. Also, if you smoke, drink alcohol or caffeinated beverages, try to cut down on your use. Get evaluated by a dr. To see if you have a heart condition or thyroid problem. Make sure you drink plenty of water daily.