If the left half of the body is numb, the first consideration is that cerebrovascular disease may be present, with the possibility of mild cerebral infarction or small focal cerebral hemorrhage being the most likely. It is recommended to go to the nearest hospital in time to improve the cranial CT or cranial magnetic resonance examination, to help clarify whether there are relevant organic lesions in the brain, and then carry out relevant treatment according to the specific disease after diagnosis. If it is cerebral infarction, anti-platelet aggregation, scavenging free radicals, activating blood circulation to remove blood stasis, and promoting the generation of collateral circulation should be carried out in general. If it is cerebral hemorrhage, bed rest is needed, appropriate use of dehydration drugs, and the later stage is all based on nutritional neurological and rehabilitation exercise therapy. If the patient does not have obvious limb paralysis, but only with sensory deficits as the main manifestation, the possibility of thalamic involvement is considered to be high.