Numbness of the feet and toes with no strength to hook upward may be caused by lumbar disc herniation, peroneal nerve injury and lumbar spinal stenosis. 1. Lumbar disc herniation: after the disc herniation, the nerve root around the waist is compressed, and the nerve root is pulled or squeezed, which leads to symptoms such as numbness of the feet and toes and lack of strength to hook upwards. 2. Common peroneal nerve injury: common peroneal nerve injury is mainly caused by trauma, there will be numbness of the feet and toes to hook up the symptoms of lack of strength, and some patients will also appear drop foot and toe flexion deformity. 3. Lumbar spinal stenosis: lumbar spinal stenosis refers to a variety of reasons for the shortening of the spinal canal diameter line, compression of the dural sac, the spinal cord or nerve roots, resulting in the corresponding neurological dysfunction of the disease so that the patient appeared to have numbness of the feet and toes hooked up the symptoms of no strength. When you have numbness of the feet and toes, you should go to the hospital in time, and cooperate with the doctor for treatment after the cause of the disease is clear.