The term urinary reflux should refer to vesicoureteral reflux. The gold standard for the diagnosis of this disease is a voiding cystourethrogram. Currently, the International Reflux Council has proposed a five-level classification: Level 1, reflux is confined to the ureter; Level 2, reflux can return to the ureter and renal pelvis, but the ureter and pelvis are not dilated and the fornix of the renal calyces is normal; Level 3, reflux shows mild to moderate dilatation or distortion of the ureter Grade 4, reflux shows moderate dilatation and distortion of the ureter, moderate dilatation of the pelvis and calyces, complete loss of the fornix, and most of the calyces maintain papillary indentation; the most severe grade 5 reflux shows severe distortion and dilatation of the ureter, severe dilatation of the pelvis and calyces, and most of the calyces do not show papillary indentation. The above-mentioned are the imaging manifestations in the urinary cystourethrography, through which the severity of reflux can be judged. It is recommended that you go to a regular hospital urology department to see a specialist for professional diagnosis and symptomatic treatment.