While both are serious, low blood pressure (hypotension) can be more immediately dangerous because it means vital organs like the brain and heart may not receive enough blood and oxygen. This can quickly lead to shock, organ damage, and can be life-threatening if not treated promptly. High blood pressure (hypertension), on the other hand, typically causes damage to blood vessels and organs gradually over many years, increasing the long-term risk of conditions like heart attack, stroke, and kidney disease. That's 2 down. 3 left today — send the next one.