Renal cysts usually refer to simple renal cysts, and there are no obvious symptoms when the cysts are small; if the cysts are large, they may cause abdominal and dorsal distension, lumbar pain, hematuria and other uncomfortable symptoms. Simple renal cysts are usually small when found in the early stage, the diameter is usually 1~2cm, usually no obvious symptoms; if the cyst is large, the diameter of more than 5cm, it can pull the renal peritoneum outward or press the renal parenchyma inward, which will cause abdominal and dorsal distension and pain, and if the capsule is secondary to the hemorrhage, there may be hidden pain in the waist, and some patients may also have hematuria or microscopic hematuria. If the cyst is huge, the patient’s abdomen can appear mass, but also on the ureter, the renal calyx neck pressure, triggering obstruction, obstruction easy to cause infection, resulting in low back pain, increased body temperature, fatigue, pus urine and other discomforts, if the cyst compression of the neighboring blood vessels, but also may cause renal hypertension. If patients find kidney cysts, it is recommended to go to the regular hospital in time, under the guidance of the doctor to the targeted treatment or treatment.