The medical term for POTS is Postural Orthostatic Tachycardia Syndrome. It is a condition that causes an abnormal increase in heart rate when standing up from a sitting or lying down position. POTS is a type of orthostatic intolerance, which is a condition in which an excessively reduced volume of blood returns to the heart after an individual stands up from a lying down position. The primary symptom of POTS is lightheadedness or fainting, which is accompanied by a rapid increase in heartbeat of more than 30 beats per minute, or a heart rate that exceeds 120 beats per minute, within 10 minutes of rising. POTS is a form of dysautonomia, which is a disorder of the autonomic nervous system that regulates functions we don’t consciously control, such as heart rate, blood pressure, sweating, and body temperature. There is no cure for POTS, but healthcare providers use several strategies to manage the symptoms of POTS, including exercise and physical activity, diet and nutrition, and medications.