Patients with symptoms of dizziness and nausea after standing for a long time mainly consider the following causes. First, it should be considered that excessive fatigue has caused the patient’s brain dysfunction and the performance of cerebral blood supply deficiency. Second, it may be caused by the patient’s weakness and low blood pressure, which can be clarified by blood pressure measurement. Thirdly, it may also be caused by chronic anemia. When standing for a long time, the patient may experience dizziness, nausea, and in severe cases, blinding. Fourthly, dizziness and nausea after standing for a long time may be related to physical weakness and malnutrition. It is recommended that patients should strengthen nutrition and increase the intake of vitamins and high-quality protein.