Pain on the right side of the waist may be caused by ureteral stones, lumbar spine injury or pelvic inflammatory disease. 1. Ureteral stones: due to the presence of stones in the ureter, the mucous membrane of the ureter forms an irritation, resulting in spasm of the smooth muscle of the ureter, leading to pain on the right side of the waist. 2. Lumbar spine injury: when the lumbar spine is injured due to trauma or other reasons, the pain in the right side of the waist can occur. 3. Pelvic inflammatory disease: Inflammation causes lumbar tissue to be stimulated, and the symptoms of lumbar pain appear. There are many other causes of lumbar pain on the right side of the waist, such as lumbar disc herniation, herpes zoster, etc., such as persistent non-relief, it is recommended to go to the hospital in a timely manner to improve the relevant examinations, to clarify the cause of the disease, and then comply with the doctor’s instructions for targeted treatment, so as to avoid delaying the condition.