Separation of the right renal collecting system is a term used in urologic ultrasound, and is commonly understood to be a dilatation of the lumen of the kidney that collects urine, including the collecting ducts, calyces, and renal pelvis. It is generally indicative of a possible right-sided hydronephrosis. Hydronephrosis is mainly caused by urinary tract obstruction, and the most common cause of urinary tract obstruction is an embedded urinary stone. When the urinary tract stone becomes embedded, the urine is not discharged well and accumulates in the renal collecting system, causing hydronephrosis, which leads to the separation of the renal collecting system. In addition to urinary stones, congenital ureteral development abnormality, urinary tract infection, and swelling compression may lead to urinary tract obstruction, resulting in renal collecting system separation. If you find the right renal collecting system separation, it is recommended to go to the regular hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.