For standing up after squatting and feeling dizzy: 1, the most common cause is upright hypotension, also known as postural hypotension, which is a manifestation of abnormal blood pressure regulation and is particularly common in middle-aged and elderly people, belonging to the instability of blood pressure regulation mechanism in the body after a person stands up quickly, triggering various symptoms of clinical maladjustment such as dizziness, vertigo, and even transient blackness and sudden collapse in patients. This condition is directly related to hypertension caused by coronary artery atherosclerosis and cerebral artery atherosclerosis.2 The above clinical symptoms may also occur in cases of adverse drug reactions, such as taking too many diuretics, antihypertensive drugs, and vasodilators.3 The above symptoms may also occur in patients with endocrine metabolism disorders and thyroid dysfunction.4 The above clinical manifestations may also occur in cases of plant nerve dysfunction.