Orthostatic hypotension is a condition characterized by a sudden drop in blood pressure when standing up from a seated or lying down position. This can result in symptoms such as dizziness, lightheadedness, and fainting. It is caused by a dysfunction in the autonomic nervous system, which regulates blood pressure and heart rate. Research in this area focuses on understanding the underlying mechanisms of orthostatic hypotension, developing effective diagnostic tools, and finding ways to manage and treat the condition. This includes lifestyle changes, medication, and physical therapy.