Sudden dizziness may be related to physiological causes, pathological diseases and other reasons. 1. Physiological causes: due to increased stress in life, sudden emotional excitement, physical overwork and other factors are prone to sudden dizziness, usually after lifting the triggers can be restored. 2. Pathological reasons For example, if the patient squats for too long and then gets up too fast, it is easy to cause postural hypotension, which leads to temporary insufficient blood supply to the brain and causes sudden dizziness. In addition, patients with high blood pressure, poor blood pressure control, resulting in high blood pressure, there will also be sudden dizziness, the need for timely hospital consultation, standardize the use of medication. Diabetic patients do not eat for a long time or excessive use of hypoglycemic drugs, causing hypoglycemia occurs, there will be dizziness, sweating, panic and other symptoms, it is recommended to carry food with high sugar content. If the frequent occurrence of sudden dizziness, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease and then symptomatic treatment.