Nutcracker syndrome (nut-crakersyndrome) is one of the rare causes of hematuria, which was first described by deschepper in 1972. The compression of the left renal vein between the superior mesenteric artery and the abdominal aorta is called the anterior nutcracker or superior mesenteric artery phenomenon, while the left renal vein travels behind the abdominal aorta is called the posterior nutcracker phenomenon. In these cases, the left renal vein is prolonged, the renal vein is compressed, and the pressure within the renal vein is elevated leading to the development of collateral veins, which manifests as varicose veins around the renal pelvis and ureter, and bleeding from the left kidney, especially in the calyces. In addition to hematuria, it can also cause varicose veins in the left spermatic vein or ovarian vein and induce renal vein thrombosis. Its clinical manifestations are periodic episodes of microscopic hematuria or carnal hematuria, and the patient’s body type is mostly tall and thin. In case of hematuria, cystoscopy can determine that the hematuria originates from the left ureteral orifice. ultrasound, CT, MRI can show that the left renal vein is compressed between the abdominal aorta and superior mesenteric artery, and the left renal vein is significantly dilated, which can clarify the presence of nutcracker phenomenon. Treatment options Most Nutcracker syndrome occurs with hematuria, which can be cured by procoagulant and antifibrinolytic drugs. Repeated hematuria, resulting in anemia and clots often blockage causing renal colic party consider surgery. Generally, this type of patient has a thin body type, so it is recommended to eat fat, so that the perirenal fat more, so that the angle between the superior mesenteric artery and the abdominal aorta increases, the symptoms may be relieved. Nutcracker surgical treatment should take a cautious attitude, and the preoperative diagnosis should be considered comprehensively, proving that the left renal vein is affected by the nutcracker, and that there is an obvious renal pelvic-venous shunt and the presence of collateral circulation.