How to treat left renal vein compression is dependent on a number of factors such as the condition, the patient’s age, physical fitness and other treatments. The details are as follows: Left renal vein compression refers to the phenomenon of high pressure in the left renal vein after the left renal vein is squeezed between the abdominal aorta and the superior mesenteric artery resulting in the obstruction of renal vein blood flow return, thus causing the phenomenon of high pressure in the left renal vein. The main clinical manifestations are hematuria and proteinuria, with or without varicocele. For patients diagnosed with simple left renal vein compression syndrome, who present with asymptomatic hematuria or upright proteinuria, they can be followed up for observation without treatment for the time being. As the fat and connective tissue at the angle between the abdominal aorta and the superior mesenteric artery increase with age or generate collateral circulation, the stasis can improve and lead to symptomatic relief. Interventional stenting may be considered if high blood pressure is present and hematuria is severe. Patients with left renal vein compression should avoid strenuous exercise and prevent colds. This is because certain triggers such as strenuous exercise and colds can induce hematuria or cause recurrent episodes of hematuria. If the patient is not feeling well, it is recommended to go to the hospital for a complete examination and active treatment.