Low back pain: Most patients have a history of low back pain for weeks or months, or a history of recurrent episodes of low back pain. The degree of low back pain varies, and severe cases may affect turning and sitting. The pain can be aggravated by coughing, sneezing or straining during bowel movement. Radiating pain in the lower extremity: Radiating pain in the sciatic nerve area of one side of the lower extremity is the main symptom of the disease, which often appears when the low back pain disappears or is relieved. The pain starts from the buttock and gradually radiates to the posterior thigh and lateral calf, and some may develop to the lateral dorsum of the foot, heel or palm of the foot, affecting standing and walking. If the herniation is in the center, the symptoms are in the cauda equina, and if the herniation is bilateral, the radiation may be bilateral or alternating. Lumbar mobility disorders: Lumbar mobility is affected in all aspects, especially posterior extension disorders. A small number of patients are significantly limited in forward flexion. Scoliosis: Most patients have varying degrees of lumbar scoliosis. The direction of scoliosis can indicate the location of the protrusion in relation to the nerve roots. Subjective numbness: Those with longer duration of disease to, often have subjective numbness. It is mostly confined to the posterior lateral calf, dorsum of the foot, heel or palm of the foot. Decreased temperature of the affected limb: Many patients feel cold in the affected limb, and on objective examination, the temperature of the affected limb is lower than that of the healthy side; in some cases, the arterial pulsation of the dorsalis pedis is also weaker, which is due to the stimulation of sympathetic nerves. It must be differentiated from embolic arteritis.$ Low back pain: Most patients have a history of low back pain for weeks or months, or a history of recurrent low back pain episodes. The degree of low back pain varies, and severe cases may affect turning and sitting. The symptoms are usually relieved after rest, and the pain can be aggravated by coughing, sneezing or straining during bowel movement. Low back pain; most patients have a history of low back pain for weeks or months, or a history of recurrent episodes of low back pain. The degree of low back pain varies, and severe cases may affect turning and sitting. The symptoms are usually relieved after rest, and the pain can be aggravated by coughing, sneezing or straining during bowel movement. Low back pain; most patients have a history of low back pain for weeks or months, or a history of recurrent episodes of low back pain. The degree of low back pain varies, and severe cases may affect turning and sitting. The symptoms are usually relieved after rest, and the pain can be aggravated by coughing, sneezing or straining during bowel movement. Low back pain; most patients have a history of low back pain for weeks or months, or a history of recurrent episodes of low back pain. The degree of low back pain varies, and severe cases may affect turning and sitting. The symptoms are usually relieved after rest, and the pain can be aggravated by coughing, sneezing or straining during bowel movement. Low back pain; most patients have a history of low back pain for weeks or months, or a history of recurrent episodes of low back pain. The degree of low back pain varies, and severe cases may affect turning and sitting. The symptoms are usually relieved after rest, and the pain can be aggravated by coughing, sneezing or straining during bowel movement. Low back pain; most patients have a history of low back pain for weeks or months, or have a history of recurrent episodes of low back pain.