The lack of leg strength is mostly seen in clinical practice in malnutrition. This condition not only leads to the lack of leg strength, but also the patient’s whole body may have no strength, speak with breathlessness, cannot lift the leg, have no appetite, and do not want to eat, because the body has no calorie metabolism because they cannot eat, so it will lead to the lack of strength of the whole body and the lack of leg strength, which is usually seen in patients with a history of stomach disease and chronic wasting diseases, such as tumors. In addition, some cerebrovascular diseases can also lead to lack of strength in the legs, such as cerebral infarction or cerebral hemorrhage, which can lead to decreased muscle strength in the legs and inability to lift the legs, and such patients can relieve their symptoms through medical treatment and rehabilitation. Patients with spinal cord type cervical spondylosis will also have symptoms of weakness in the lower limbs, unstable walking and a feeling of stepping on cotton. Magnetic resonance examination is required to confirm the diagnosis, and conservative treatment is ineffective and requires surgery.