Nutcracker syndrome is usually not harmful to the body, and only in a very small number of patients does it progress to renal failure. Nutcracker syndrome is a common name for what is known as left renal vein compression syndrome. This disease is a series of disease processes caused by the left renal vein being compressed by the superior mesenteric artery and the abdominal aorta during the reflux process, resulting in kidney stasis. The main symptom of this disease is hematuria, mostly microscopic hematuria, which is aggravated in the standing position or after activity, and the prognosis is usually good, especially for thin patients, who may recover after nutritional fattening. The majority of the remaining patients will not have serious complications, but only a very small number of patients will find a gradual increase in the amount of urine protein and deterioration of kidney function during the dynamic review of urine routine, kidney function and ultrasound, for which treatment is required. The first treatment is to place stents inside and outside the renal vein; the second treatment is to divert the renal vein.