Dizziness and dizziness without spirit, fatigue and nausea are mostly caused by upper respiratory tract infections, digestive system diseases, cardiovascular and cerebrovascular diseases and carbon monoxide poisoning. 1. Upper respiratory tract infection: the above symptoms are most commonly caused by various causes of upper respiratory tract infection, caused by a variety of pathogens, bacteria, viruses, atypical pathogens, will cause the body’s immune response, resulting in dizziness, dizziness, lack of energy, fatigue, nausea symptoms. 2. Digestive system diseases: acute gastroenteritis and other diseases, in the pre-disease stage will also appear nausea, dizziness, and then the symptoms of weakness and lack of energy. 3. Cardiovascular and cerebrovascular diseases: when suffering from cerebral infarction, coronary artery insufficiency, myocardial ischemia and other diseases, a series of symptoms mentioned above can also occur, in addition, low blood pressure can also cause the above symptoms. 4. Carbon monoxide poisoning: the above symptoms need to be alert to whether the exposure to carbon monoxide, or in the environment with carbon monoxide, carbon monoxide poisoning will occur when such symptoms. There are many reasons for dizziness and nausea, so it is recommended that patients seek timely medical attention to identify the causes, and under the guidance of the doctor to carry out targeted treatment.