The causes of dizziness, nausea, vomiting and weakness are mainly considered as follows: 1. If dizziness is accompanied by panic, sweating and weakness of limbs tremor, it may be caused by hypoglycemia and should be supplemented with sugar to get better; if the patient is dizzy every day, tired and weak, with a slightly yellowish complexion, think about whether there is anemia or other systemic diseases and should go to the hospital for a comprehensive examination. 2. cerebellar lesions. Dizziness, nausea or vomiting, and unstable walking like drunkenness in middle-aged and elderly people, this condition is cerebellar lesions leading to ataxia, commonly caused by cerebellar infarction or hemorrhage, the most common being infarction of the posterior inferior cerebellar artery; 3. Patients with nausea, desire to vomit, dizziness, and weakness, if the symptoms are not heavy and manifest as dizziness and sinking mainly, consider that it is caused by insufficient blood supply to the brain. Insufficient cerebral blood supply leads to the characteristics that patients will repeatedly experience dizziness and headache, accompanied by weakness and nausea. 4. Viral invasion: dizziness, nausea, visual rotation and vomiting after external fever, which is caused by viral invasion of the inner ear causing vagal edema, resulting in peri-cochlear neuropathy: a symptom that occurs when the body’s position sense is impaired. This condition can affect work life. Common such diseases are: Meniere’s disease, vestibular neuronitis, labyrinthitis, etc. 5. Cervical spine problems: dizziness and neck discomfort, head swelling and pain, or numbness and pain in the upper limbs: often caused by cervical spondylosis with insufficient blood supply to the basilar artery.