Sudden sitting dizziness may be caused by many reasons, and the following are some possible reasons: hypoglycemia: when the blood sugar level is too low, it may cause dizziness, fatigue, sweating, rapid heartbeat and other symptoms, even fainting. Hypoglycemia is usually caused by irregular diet, side effects of drugs, excessive insulin or abnormal body metabolism. Hypoxia: When the body does not have enough oxygen supply, it will cause dizziness, dizziness, fatigue and other symptoms. Hypoxia may be caused by heart disease, lung disease, high altitude hypoxia, respiratory obstruction and other reasons. Inner ear problem: The inner ear is one of the main components of the balance organ. When there is a problem in the inner ear, it may cause dizziness, dizziness, instability and other symptoms. The inner ear problem may be caused by ear infection, otolith disease, Meniere's disease and other reasons. Nervous diseases: Some nervous system diseases, such as multiple sclerosis and Parkinson's disease, may also cause dizziness and dizziness. Anemia: When the body lacks enough red blood cells or hemoglobin, it may cause dizziness, fatigue and other symptoms. Anemia is usually caused by lack of nutrients such as iron, vitamin B12 or folic acid. In short, there are various reasons for sudden sitting dizziness. If such symptoms occur, it is recommended to seek the help of a doctor in time to determine the exact cause and carry out corresponding treatment. When you are sitting, you suddenly feel dizzy and stand up suddenly: if you stand up suddenly while you are sitting, your blood pressure may drop temporarily, causing you to feel dizzy. This condition is often referred to as "standing hypotension". Anemia: Anemia is a disease caused by insufficient red blood cells or hemoglobin. It may cause you to feel particularly dizzy while sitting. Inner ear problem: The inner ear is a key part of the body to maintain balance. If you have problems with your inner ear, you may feel particularly dizzy when sitting. Cardiovascular problems: Cardiovascular problems such as heart disease and arrhythmia may also cause you to feel particularly dizzy while sitting. Hypoxia: When your body lacks enough oxygen, you may feel particularly dizzy while sitting. This may be caused by respiratory problems, lung diseases and other reasons. In short, when you are sitting, you suddenly feel particularly dizzy, which may be the manifestation of some physical problems. If this condition often occurs or is accompanied by other symptoms, it is recommended to consult a doctor in time and carry out corresponding examination and treatment. (Xinhua News Agency)