Unseparated kidneys is a normal ultrasound, for the description of the kidneys and renal pelvis. Under normal circumstances, if there is no hydronephrosis or ureteral obstruction, the urine produced by the kidneys can be drained to the bladder through the ureter in time, and the ultrasound examination will reveal the description of both kidneys not separated, so there is no need to have any worries because there is no problem with only both kidneys not separated. When patients present with a small amount of fluid in both kidneys and the renal pelvis, they may have ureteral stones, etc., ureteral obstruction or abnormal development of the kidneys themselves. When there are problems with the bladder, there may be a separation of the renal pelvis, dilatation of the ureters, and other descriptions. Instead, the above description suggests a possible abnormality compared to the absence of separation of both renal pelvis. When the presence of diseases such as ureteral stones leads to poor urine drainage channels, it tends to increase the likelihood of kidney and ureteral diseases, as well as corresponding diseases of the urinary system. Therefore, patients with descriptive words such as separation of both kidneys, separation of the renal pelvis, or dilatation of the ureter on examination should be referred to the Department of Urology.