The symptoms of dizziness and nausea when lying down are fine, and when one gets up, they are considered to be caused by postural hypotension. Because the patient’s blood pressure is not adjusted in time when the position changes, it will lead to insufficient cerebral perfusion, and the patient will experience dizziness. It is recommended that the patient’s blood pressure be measured in the prone and standing positions, that is, when the patient is lying down, and when the patient is standing for 2 minutes. If the difference between the two measurements is more than 20 mmHg, the patient may be suffering from postural hypotension and may be suffering from poor health and anemia. Patients with multisystem atrophy may also have postural hypotension after uprightness, and the blood pressure will not be relieved quickly, and the patient may experience dizziness and nausea. If multisystem atrophy is considered, the patient’s life expectancy may be short, and the life expectancy of multisystem atrophy is 5-10 years.