When elderly people experience dizziness when they get up, there are two main reasons to consider: 1. Postural hypotension. When elderly people stand up, their blood pressure is in a low state, and when they measure their blood pressure, they will find that their systolic blood pressure drops by more than 20 mmHg, which will be diagnosed as postural hypotension. Due to the presence of postural hypotension, patients will suffer from insufficient blood supply to the brain, causing symptoms such as dizziness. 2. Sympathetic nerve dysfunction. With the increase of age and the development of atherosclerosis, sympathetic nerve dysfunction occurs, resulting in the sympathetic nerve not being able to adjust the small blood vessels of the body in time for surgery when the elderly are standing, which can cause the blood vessels of the whole body to remain in a dilated state, resulting in reduced blood flow to the brain and causing symptoms of dizziness. When the symptoms of dizziness appear, it is recommended that the elderly do not move too quickly when getting up, but must move slowly to get up.