Sudden pain in the lower back that prevents bending and standing is mostly considered to be an acute sprain of the lower back or an acute attack of lumbar disc herniation due to long-term strain or trauma. Patients should rest in bed, avoid activities, and can take appropriate non-steroidal anti-inflammatory painkillers under the guidance of a doctor. If the symptoms are serious, it is recommended to seek medical attention in time and actively treat to avoid delaying the condition. Commonly there are the following cases: 1, acute lumbar sprain: mostly due to strenuous activities, by external forces such as pulling caused by lumbar injury, mainly manifested as lumbar stiffness, severe pain, turning difficulties, limited activities. In the acute stage, pain can be relieved by ice, heat, physical therapy, and bed rest, and anti-inflammatory and analgesic drugs such as ibuprofen and acetaminophen can be used appropriately. If the pain is severe and persistent and cannot be relieved, and accompanied by muscle cramps in the lower back, local closure treatment can be used, commonly used drugs include procaine, bupivacaine, etc. At the same time, vitamins and calcium can be appropriately supplemented to promote recovery; 2, lumbar disc herniation: the growth of age and the accumulation of injuries are the main causes, including physical labor, sedentary squatting, driving, etc.; at the same time, acute trauma can lead to an acute attack of the disease. Low back pain is the first symptom, can be relieved by lying down, standing will intensify the pain, with the development of the disease can extend to leg discomfort. Acute onset requires bed rest, but long-term bed rest is not recommended, and appropriate lumbar brace can be worn for activities. For those with muscle spasm, muscle relaxants such as ethylprednisolone and clozoxazone can be used. At the same time, oral vitamin B can be taken to nourish the nerves. It can also be assisted by Chinese medicine physiotherapy, which can relieve the symptoms; 3, lumbar back myofasciitis: mostly due to acute lumbar sprain not treated in time, cold stimulation, chronic strain and other effects, the onset of severe soreness-like pain in the lumbar back, generally serious pain in the morning and evening, relatively light pain during the day, in addition to pain is accompanied by lumbar back stiffness, unable to stand and other symptoms. Treatment is mostly based on local hot compresses, oral medication to relieve pain, and can also be combined with lumbar back muscle stretching training, closure therapy, etc. to help recovery; 4. Other: diseases such as lumbar spine slippage or stenosis, tumors, tuberculosis, etc. can cause lumbar spine involvement, which in turn can lead to pain, inability to bend and stand; or inflammatory lesions such as rheumatoid arthritis, ankylosing spondylitis, gynecological inflammation, etc., may also lead to the sudden appearance of patients back pain, inability to bend and stand. Therefore, patients are advised to seek medical attention and early treatment after symptoms appear.