The document provides information about dysautonomia and postural orthostatic tachycardia syndrome (POTS). It defines dysautonomia as a dysfunction of the autonomic nervous system, which controls involuntary body processes. Common POTS symptoms include nausea, fainting, lightheadedness, anxiety, and abnormal heart rate and blood pressure when standing. The causes are often unknown but may include viral infections or injuries. Diagnosis involves tilt table tests and other medical exams. While there is no cure, treatment focuses on lifestyle changes, medications, hydration and exercise to manage symptoms.