Suprarenal cysts exceeding 4 cm can mostly compress the surrounding tissues, resulting in symptoms such as lumbago, abdominal pain, hematuria and urinary retention. Simple renal cyst is the most common type of renal cystic disease in clinic, and its incidence increases gradually with age, usually without clinical symptoms and does not affect renal function. If the renal cyst is too large and compresses the surrounding tissues, it may cause lumbago and abdominal pain, the pain is usually fixed on one side or both sides, the abdominal mass can be touched, and there is a small amount of proteinuria and other symptoms. Renal cysts may also compress the neighboring blood vessels, causing changes in renal hemodynamics, resulting in a series of neuroendocrine feedback regulation, causing hypertension. If the cyst breaks into the renal pelvis and calyx system, carnal hematuria will occur. In addition, cysts can also lead to obstruction of the renal pelvis and renal calyces, potentially causing urinary retention. Patients with cysts on the kidneys are recommended to consult regular hospitals and standardize treatment under the guidance of physicians.