There are no obvious symptoms in the early stage of parapelvic cysts, and most of the patients may have lumbar pain, hematuria, elevated blood pressure, abdominal mass and other manifestations after middle age. 1. Lumbago: mainly caused by the cyst compressing the renal pelvis and ureter, resulting in the pericardium being pulled or the smooth muscle spasm of the ureter, which is manifested as lumbar pain, muscle pain and swelling and other discomforts. 2. hematuria: if the cyst ruptures and connects with the renal pelvis, hematuria can be seen in the naked eye. 3. Elevated blood pressure: cyst compression can make the renal parenchyma ischemic, and the body increases renin and angiotensin, resulting in elevated blood pressure. 4. Abdominal mass: in patients with large cysts or more serious hydronephrosis, an obvious abdominal mass can be detected. When patients have the above symptoms and suspect the existence of parapelvic cysts, they should seek medical treatment in time to improve the relevant examinations, such as blood routine, urine routine, ultrasound, CT, MRI and so on, so as to make a clear diagnosis of the disease and carry out treatment.