The two sides of the back of the waist can be caused by the following causes: first, lumbar dorsal myofasciitis, lumbar dorsal myofasciitis can lead to pain in the fascia on both sides of the waist, often due to cold and strain, which should be diagnosed by early physical examination and examination to exclude other diseases. Second, lumbar muscle strain, lumbar muscle strain can also lead to bilateral lumbar muscle pain, often soreness, patients should be early physical examination to diagnose, but also physical therapy and oral medication, topical medication. Third, kidney deficiency, kidney deficiency can also lead to symptoms of soreness on both sides of the waist, which can be accompanied by weakness of the knees and general symptoms of fatigue and lethargy, which should be diagnosed at an early stage by taking a pulse at the Chinese medicine department and treated with oral kidney medicines at an early stage.