Sit or lie down and rest
Slow your breathing with long, steady exhales
Drink water if you may be dehydrated
Move to a cooler, quieter place
Loosen tight clothing
Avoid caffeine, nicotine, alcohol, and stimulants
Try gentle, slow walking if the fast rate is from anxiety or stress
Use relaxation techniques such as meditation or progressive muscle relaxation
Splash cool water on your face
Practice paced breathing: inhale slowly, exhale longer than you inhale
Check your pulse again after a few minutes of rest
Seek urgent medical help if you have chest pain, shortness of breath, fainting, severe dizziness, or a very fast heart rate that does not improve