Numbness of the lower limbs caused by thoracic spine fracture for four months may be due to nerve compression, displacement of the fracture end, etc., which can be relieved by physical therapy, medication and surgical treatment. 1. Physiotherapy: it may be due to long-term bed-ridden inactivity, resulting in nerve compression, can be localized hot compresses or massage techniques, to alleviate the symptoms of numbness. 2. Medication: Oral nutritional nerve medication such as methylcobalamin and adenosylcobalamin can also be taken to help relieve symptoms. 3. Surgery: The fracture may be displaced, resulting in compression of the spinal cord or nerve roots in the vertebral canal, resulting in numbness of the legs. Surgery can be used to relieve the compression of the spinal cord and nerve roots in the spinal canal, so that the symptoms of numbness in the legs can be restored. It is recommended to use medication under the guidance of a doctor, not blindly self-medication to avoid adverse effects.