Vertigo when lying down to the side of the clear cause of the treatment, paroxysmal benign positional vertigo main manipulation reset; vertebral artery-type cervical spondylosis can be taken drugs, physiotherapy and surgery, etc.; cerebral infarction guide can be given medication. 1. Paroxysmal benign positional vertigo: otolith activity in the inner ear when lying down to the side, vestibular dysfunction will be manifested as vertigo, and the preferred treatment is manipulative repositioning. 2. Vertebral artery-type cervical spondylosis: this disease is mainly due to osteophytes, ligament deterioration of the vertebral artery pressure and manifested as symptoms of insufficient cerebral blood supply. Flunarizine, vincristine and other drugs can be given to improve the circulation, acupuncture, massage and other physical therapy and cervical anterior discectomy and bone grafting fusion surgery and other surgical treatments. 3. Cerebral infarction: this disease is caused by atherosclerosis of cerebral vertebral basilar artery or posterior cerebral artery, resulting in cerebral tissue ischemia and hypoxia, at the onset of alteplase intravenous thrombolysis; aspirin, clopidogrel and other drugs to combat platelet aggregation; atorvastatin, risculetin and other lipid stabilization of plaques; periclaxicine, dulcolax to improve the circulation of drug therapy. Vertigo when lying down to the side, it is recommended to consult a doctor in time, after the cause of the disease is clear targeted treatment, do not blindly self-medication.