Breathing back pain may be caused by lumbar disc herniation, muscle fiber injury in the lumbar region, trauma to the lumbar region and other reasons. 1. Lumbar disc herniation: after a lumbar disc herniation, the pressure in the spinal canal will be elevated, and breathing will increase the pressure in the thoracic and abdominal cavities, which will lead to changes as well as elevation of the pressure in the spinal canal. Through the reflex of the nerves, it will reach the lumbar region and cause muscle pain in the lumbar region. 2. Lumbar muscle fiber injury: a long time a posture or a long time bending down and strenuous exercise, are prone to lumbar muscle fibers are repeatedly pulled, local congestion and edema, the formation of aseptic inflammation and lead to chronic lumbar strain, in the inhalation of the muscle fibers will be contracted resulting in lumbar pain. 3. lumbar trauma: after lumbar injury, breathing may make the local muscles subject to certain activities and stimulation, thus aggravating the exudation of the injured area, and cause lumbar pain when breathing. In addition to this, there are lumbar spinal stenosis, ureteral stones, kidney stones, tumors and so on that cause respiratory back pain. Patients should go to the hospital in time, clear the cause of the disease, targeted treatment under the guidance of professional doctors.