There are many causes of lumbar right side pain, such as trauma, lumbar disc herniation, chronic strain injury, kidney disease, infectious factors, etc. 1. Trauma: the right side of the waist suffered external blows, sticks, car accidents, etc., may lead to lumbar muscle, bone damage, so it will lead to the right side of the waist soreness and swelling pain. 2. Lumbar disc herniation: Lumbar disc herniation can lead to disc nucleus pulposus prolapse, increase the pressure of the spinal canal, which can stimulate the local nerves, thus leading to lumbar right-sided pain. 3. Chronic strain injury: cold stimulation, long-term lumbar weight-bearing, overwork, etc., will lead to lumbar muscles repeatedly pulling contraction, the formation of aseptic inflammation, resulting in lumbar congestion, edema, and therefore may cause lumbar right-sided pain and swelling. 4. Kidney disease: kidney stones in the right kidney, pyelonephritis and other diseases, can also lead to the phenomenon of lumbar right-sided pain, mainly in paroxysmal pain. 5. Infectious factors: lumbar spine suffers from fibrositis, osteomyelitis and other diseases, due to the spread of inflammation to the right side, stimulation of the nerves can also cause lumbar right-sided pain. The causes of lumbar right-sided pain are many and complex, after the symptoms, it is recommended that patients go to the hospital in a timely manner to improve the examination, after a clear diagnosis to give targeted treatment.