Feeling lumbar pain and weakness can be caused by the following reasons: first, lumbar muscle strain, patients with lumbar muscle strain can have chronic injury to the muscles of the lumbar region and experience lumbar pain, and at the same time can feel lumbar weakness, especially after sitting for a long time and getting cold, the symptoms of lumbar pain and weakness are more obvious, then early examination and examination should be done to exclude other diseases for diagnosis. Secondly, tumor of the lumbar region, when there is a tumor in the lumbar spine, there can be lumbar pain and at the same time can be accompanied by weakness of the lumbar region, then it is necessary to check the MRI, CT and blood tests of the lumbar spine for early diagnosis and early treatment. Third, kidney deficiency, kidney deficiency can also have symptoms of lumbar pain, weakness of the knees, can be accompanied by fatigue and tiredness of the whole body symptoms, then we should go to the Chinese medicine department to take pulse diagnosis, early oral kidney medicine treatment. Fourth, kidney disease, when the kidney has stones or inflammation, tumors, can also have back pain, weakness symptoms, then we should check the kidney ultrasound, CT and do urine tests to diagnose.