Morning pain in the middle of the back can be caused by the following causes: first, ankylosing spondylitis, ankylosing spondylitis can involve the entire spine, can have morning pain and discomfort in the spine, can have morning stiffness, can be accompanied by pain in the sacroiliac joint, this time to early examination of the sacroiliac joint X-ray, lumbar spine X-ray and blood tests, to diagnose and early treatment. Second, rheumatoid, rheumatoid can involve the spine, resulting in pain in the spine, in the morning there can be increased pain in the middle of the spine behind the waist, can be accompanied by morning stiffness, this time to check the spine X-ray, CT and blood tests for early diagnosis and early treatment.