Numbness of the left foot after a compression fracture of the thoracic 12 vertebrae may be caused by nerve compression or prolonged bed rest, etc., and should be treated with medication or surgery. 1. Nerve compression: Numbness of the feet after a compression fracture of the thoracic vertebrae may be caused by displacement of the fracture ends, resulting in compression of the spinal cord or nerve roots in the spinal canal. It is necessary to seek medical treatment in time for surgical treatment to relieve nerve compression, or follow the doctor’s instructions to apply vitamin B1, methylcobalamin and other drugs to nourish the nerves, and apply mannitol and other drugs to reduce the edema of the nerve roots. 2. Too long bed rest: when the thoracic vertebral compression fracture is treated by surgery or conservative treatment, it is necessary to stay in bed for a long time. Due to the lack of functional exercise for a long period of time, the symptom of numbness of the left foot may appear in the early stage of the activity, and it is necessary to consult a doctor to perform the functional exercise actively, which can help to restore the sensory and motor function of the limbs as soon as possible. When left foot numbness occurs after thoracic vertebrae fracture, it is necessary to consult a doctor in time, and the specialist will clarify the condition and then actively carry out appropriate treatment, which will help to reduce the numbness of the foot as soon as possible.