Suddenly waist pain can not straighten up this situation is mainly three kinds of diseases: 1, lumbar spine and synovial joints of synovial embedded, this is due to the bending, and lumbar twisting, violent straightening lead to synovial joints to synovial embedded in which, will produce lumbar severe pain, this situation will appear waist straight up, need to go to the hospital orthopedic or massage department for manipulation reset, lift the synovial joints to synovial embedded, the symptoms will be significantly reduced. 2, may be acute lumbar sprain, such as lifting and carrying heavy objects due to excessive force will lead to muscle more than the normal load and symptoms will be significantly reduced. 2, there may be acute lumbar sprain, such as lifting and carrying heavy objects, due to excessive force, will lead to muscle over the normal load and the occurrence of strains, will be in the local formation of bruising, swelling and inflammatory edema lead to straight up, a straight back, will feel obvious pain in the lower back. This situation should be bed rest, so that the strained muscles to fully relax, to avoid continuing to be pulled and muscle tension, and in the acute phase of the choice of cold compresses to reduce the local damage of the blood seepage, to avoid swelling and bruising edema aggravation. Oral anti-inflammatory pain and muscle relaxants, such as nimesulide, ibuprofen, ethylphenidate hydrochloride tablets can play a very good pain relief. 3, due to ureteral stones, this is due to the kidney after the stone detachment, down the ureter, the process of ureteral tube wall stimulation and the emergence of pain in the lower back, the situation can be increased by increasing the amount of drinking water to discharge the stone. If the stone is large, extracorporeal shock wave lithotripsy or holmium laser surgery is needed.