Dizziness, nausea, want to vomit when standing up, lying down is fine, high anxiety and postural hypotension, iron deficiency anemia, cerebrovascular stenosis and other related. 1. Postural hypotension: when the patient changes position, there will be a sudden decrease in blood pressure and a decrease in cerebrovascular blood volume, resulting in dizziness, nausea and vomiting. After the diagnosis of this disease, nutrition should be strengthened and appropriate activities should be carried out. 2. Iron deficiency anemia: Due to the reduction of oxygen content in human blood, dizziness, nausea, vomiting and so on can occur when standing, and it is fine when lying down. After the onset of iron should follow the medical advice to use iron to correct anemia. 3. Cerebral vascular stenosis: If there is serious cerebral vascular stenosis, it can lead to insufficient cerebral blood supply. Cerebral blood supply insufficiency is aggravated when standing up, which may manifest as dizziness, nausea, wanting to vomit and other symptoms. This disease is improved by medication and interventional therapy. After the onset of this disease, it is recommended that patients should go to the hospital in a timely manner to improve the auxiliary examination to clarify the cause of the disease.