A cyst on the kidney usually refers to a renal cyst, which is generally a benign disease with slow changes and no obvious clinical symptoms, and patients usually find the cysts through physical examination. The severity of kidney cysts needs to be assessed by professional doctors based on the location, volume, growth rate and the presence of compression of the cysts as well as the treatment method. Most simple renal cysts, with small cyst size, have no adverse effects on the function of the kidney and the tissues surrounding the kidney, so they do not require special treatment, but they need to be followed up every 0.5-1 year. If the kidney cyst is enlarged and the diameter is more than 4-5 cm, or if the number of cysts is large and compresses the surrounding blood vessels and nerves, causing vascular occlusion or urinary tract obstruction, percutaneous puncture kidney cyst sclerotherapy is needed under CT guidance to aspirate the fluid inside the cyst and inject sclerosing agent inside the cyst to promote the shrinkage and absorption of the cyst to achieve the purpose of treatment. If the cyst continues to grow and cause more serious consequences to the organism, laparoscopic nephrectomy should be performed in time to remove the cyst site and relieve and relieve the symptoms of compression.