The precursor of cerebral infarction can appear dizziness and hand numbness, but dizziness and hand numbness can also be caused by cervical spondylosis and insufficient blood supply to the brain. Cerebral infarction is clinically known as cerebral infarction, which is a limited ischemic necrosis of brain tissue, and the general precursor can appear yawning, blackness in front of the eyes, numbness of the limbs, limb weakness, dizziness and so on. If the internal carotid artery occlusion, there can be limb impairment, but also vertigo, choking on water, headache and other symptoms. However, dizziness and hand numbness may also be caused by cervical spondylosis, insufficient cerebral blood supply, low blood pressure, brain tumors and other diseases. The occurrence of uncomfortable symptoms should promptly go to the hospital, by professional doctors combined with medical history, signs, symptoms and related examinations and other comprehensive diagnosis. Daily attention should be paid to low-salt, low-fat, high-fiber and other healthy diet, regular work and rest, to develop healthy habits, avoid staying up late, reasonable exercise. It is recommended that patients consult a doctor in time to clarify the causes of dizziness and numbness of the hands, and follow the doctor’s instructions for symptomatic treatment.