Half leg numbness may be caused by cerebral infarction, which is usually seen mainly in the basal ganglia area, radiocoronal area, or may be caused by lacunar cerebral infarction. Patients with cerebral infarction in the basal ganglia region mainly show sensory and motor disorders in the lateral limbs, and may also suffer from hemianopsia and quadrant blindness, and speech dysfunction can be seen in the case of left-sided lesions. In case of radial coronal lacunar cerebral infarction, most of them only show single limb sensory disorder, such as half leg numbness, or unilateral upper limb sensory abnormality, motor dysfunction, hemianopsia, quadrant blindness. The treatment of this disease is mainly to actively treat the cerebral infarction, which mainly includes antiplatelet aggregation therapy, neuroprotective therapy, and improvement of blood circulation therapy. Antiplatelet aggregation therapy generally applies aspirin; neuroprotective therapy mainly applies edaravone, cytarabine, and ceruloplasmin hydrolysate; drugs to improve blood circulation can be applied with sudorubicin, vincristine, and chuanxiongxiong zhen. If the patient’s sensory impairment is severe, acupuncture treatment and rehabilitation treatment can also be carried out if necessary.