If a patient gets up with a blackout after doing so for a long time, it is usually a manifestation of abnormal blood pressure regulation called postural hypotension, also known as upright hypotension. This condition is particularly common in the elderly population, refers to the sedentary or quickly stand up, the sudden appearance of dizziness, black haze, syncope uncomfortable symptoms, the causes of this situation include non-neurogenic factors and neurogenic factors. Neurogenic factors are usually caused by the inability to increase sympathetic vasoconstriction after sudden standing, and non-neurogenic causes include insufficient effective blood volume and adverse reactions to medications, such as long-term use of antihypertensive drugs, diuretics, vasodilators, and other conditions.