There are many reasons for right-sided low back pain, and the common ones are muscle strain, trauma, deformity, tumor, and urinary system diseases. 1. Muscle strain: long-term heavy physical labor causes inflammation of the muscles and fascia around the right osteoarthritic joints, which results in right-sided lumbago. 2. Trauma: Acute trauma to the lumbar region causes structural damage to the bone or soft tissue, such as vertebral fracture, vertebral subluxation, ligament rupture, etc., which may cause right-sided lumbago. 3. Deformity: congenital deformity of lumbar spine, such as hidden spina bifida, lumbar sacralization, thoracic lumbarization, spinal stenosis, etc., can also be manifested as right-sided low back pain. 4. Tumor: lumbar spine tumor is common with secondary tumor, the growth of tumor destroys the bone, and the sensory nerves on the periosteum or ligament are stimulated to produce low back pain on one side. 5. Urological diseases: kidney stones, ureteral stones, pyelonephritis and so on can be seen on one side or both sides of the low back pain, and the right side of the low back pain may occur. There are many causes of right-sided low back pain, you need to go to the hospital as soon as possible, according to the specific condition of the doctor, to develop individualized diagnosis and treatment plan, so as not to delay the condition.