One of the most common symptoms of low blood pressure is fainting, which can be caused by a sudden drop in blood pressure. A doctor can diagnose this condition by checking the blood pressure, heart rate, and pulse. If your pulse is rapid and shallow, this can signal a problem with your heart’s ability to pump blood. Your doctor may also perform an electrocardiogram and a blood sugar test to diagnose the symptoms of low blood pressure. A tilt-table test, which simulates a sudden change in posture, may also be used to assess for orthostatic hypotension.
Low blood pressure may also be the result of your body not adjusting to changes in position. This may be the case if you experience dizziness when you stand up or walk. The body’s internal sensors (inner ear and vestibular nerve) signal when it’s time to move and elevate its blood pressure. However, you may be experiencing low blood pressure due to a problem with your vestibular system, which is responsible for regulating your body’s blood pressure.
Another possible cause of low blood pressure is a disease or condition affecting the adrenal glands. These glands sit above the kidneys and produce hormones that regulate blood pressure. When the adrenal glands become damaged, they produce less hormones, lowering your blood pressure. Neurally-mediated hypotension can also be the result of standing for an extended period of time. Your brain sends false signals to the heart to slow down, causing a dip in your blood pressure.