Left renal vein nutcracker, mainly the left renal vein into the inferior vena cava process, there is penetration between the abdominal aorta and the superior mesenteric artery, when the process of penetration is squeezed, the corresponding symptoms will appear. For example, the most common are hematuria, pain in the lower back with proteinuria. Left renal vein nutcracker can be diagnosed by doing an ultrasound of the renal vessels. Distal to the compression, there is a visible dilatation of the vessels, while the proximal vessels are normal. Left renal vein nutcrackers are particularly common in thin patients. The simplest treatment option is to gain weight so that with more adipose tissue, the degree of compression is significantly reduced.