The pain on both sides of the back of the waist may have the following causes: first, fasciitis of the lumbar back muscles, fasciitis of the lumbar back muscles can appear pain on both sides of the waist, it is necessary to carry out relevant examinations to exclude other diseases for diagnosis. Second, lumbar muscle strain, lumbar muscle strain can appear on both sides of the waist muscle damage, and the pain on both sides of the waist. Third, rheumatoid diseases, when rheumatoid involvement of the spine, can appear on both sides of the waist pain, then to carry out blood tests and lumbar spine X-rays, CT, nuclear magnetic examination for diagnosis. Fourth, osteophytes and osteoporosis of the lumbar spine, when osteoporosis of the lumbar spine occurs, pain on both sides of the waist can also occur, then the relevant blood tests as well as lumbar spine X-ray and CT examination should be performed for diagnosis.