The right back pain of the waist may be caused by lumbar muscle strain, lumbar intervertebral disc herniation, bone tumor and other reasons. 1. Lumbar muscle strain: long-term repeated excessive lumbar movement and overload, resulting in lumbar muscles in a long-term overstretched state, which in the long run leads to fatigue injury of lumbar muscles, causing pain on the right side of the back of the waist. 2. Lumbar disc herniation: Lumbar disc herniation is caused by degenerative changes in the lumbar discs, and the lumbar disc herniation oppresses the spinal cord and nerve roots, which causes low back pain, and the pain can also be radiated to the thighs, calves and other parts of the body. 3. Bone tumor: the lumbar bone tissue can cause right back pain due to the invasion of tumor tissue, causing local soft tissue destruction and bone destruction. The right back pain of waist should go to the hospital in time, improve the examination, and give targeted treatment in time after the cause is clear to avoid further progress of the condition.