Hypotension is the medical term for low blood pressure. In its most common form, known as postural hypotension, dizziness or lightheadedness occur when a person stands or sits up suddenly.
Hypotension can have many possible causes, from dehydration to the side effects of certain medications or an underlying health problem. Disorders that may cause hypotension include heart problems; hormonal conditions, such as diabetes ; and nervous system conditions, such as Parkinson’s disease .
Severe blood loss or burns, anaphylactic shock (severe allergic reaction), septicemia (infection in the bloodstream), and heart attack can all cause sudden, severe hypotension