According to MedicineNet, POTS stands for postural orthostatic tachycardia syndrome. It is a group of disorders that causes orthostatic intolerance as the primary symptom. Since POTS actually describes a group of conditions, the symptoms are widespread.
Another primary symptom of POTS is fainting or feeling dizzy, states MedicineNet. This symptom is due to the orthostatic intolerance that occurs. Doctors are unsure what causes POT syndrome to occur, but they do know the syndrome can occur after pregnancy, major surgery, viral illness or trauma. This disease can be treated with a variety of medications, which relieve the affected patient's low blood volume and circulatory problems that lead to fainting spells.