Hypotension, also known as low blood pressure, is a medical condition that is characterized by a lower than normal blood pressure. For a normal, healthy adult, the blood pressure is around 120/80mmHg. People suffering from hypotension have a blood pressure of less than 90/60 mmHg, leading to symptoms of dizziness and fainting. In severe cases, low blood pressure can be life-threatening when not enough oxygenated blood is carried to the brain. There are many types of hypotension depending on the causes: Orthostatic Hypotension (a sudden drop in blood pressure due to standing up suddenly), Postprandial Hypotension (a sudden drop in blood pressure after eating) and Neurally Mediated Hypotension (low blood pressure from faulty brain signals due to miscommunication between the heart and the brain).