Bending down and standing up straight without pain need to be treated according to the cause, the common causes are chronic lumbar muscle strain, acute lumbar sprain, lumbar spinal stenosis and so on. Treatment includes physical therapy, medication and surgery. 1. Chronic lumbar muscle strain: lumbar muscle, fascia, ligaments and other soft tissue injuries caused by lumbar pain can not bend. Daily to correct bad posture, strengthen the low back muscle exercise; pain obvious oral diclofenac sodium, indomethacin and other anti-inflammatory analgesic, if necessary, can choose lidocaine, trimethoprim closed treatment, the effect is good. 2. Acute lumbar sprain: sustained pain in the lumbar region caused by external pulling, unable to bend over. Sprain need to lie down and rest, acute first ice packs to relieve pain; later can be used hot compresses, massage techniques, baked electricity and other physiotherapy to promote blood circulation. Pain is obvious can be oral ibuprofen, acetaminophen and other anti-inflammatory analgesic. 3. Lumbar spinal stenosis: simple lumbar pain can be treated conservatively, such as traction, massage, wearing a brace and other physical therapy; ibuprofen, celecoxib and other anti-inflammatory analgesic; chlorzoxazone, ethylphenidate and other to improve the muscle tension; methylcobalamin, nerve growth factor and other nutrients to improve the nerve function; claudication, radiating pain in the lower extremities, such as conservative treatment is ineffective can be surgical treatment. Lower back pain can not bend over there may be other reasons, such as lumbar pain can not bend over it is recommended to consult a doctor under the guidance of the doctor to improve the examination to clarify the cause of targeted treatment. The above drugs should be used under the guidance of a doctor.