Untreated renal cysts may cause intestinal obstruction, high blood pressure, infections, and in severe cases may induce cancer. Renal cysts may occur unilaterally or bilaterally and usually have no obvious symptoms. Very few patients have compressive intestinal or biliary obstruction. If the cyst compresses the neighboring blood vessels, local renal blood flow will be reduced, renin level will be increased and hypertension will occur. Once infection occurs, there may be low back pain, pus and urine, fever, etc.. Rupture of the cyst cavity is rare, and once it occurs, the consequences are more serious. Most patients with renal cysts have a better prognosis after treatment and usually do not cause harm to the body. However, if treatment measures are not taken in time and regular review is not done, it may induce cancerous transformation of cells and appear as kidney cancer, which will seriously jeopardize the health of patients. Therefore, once diagnosed with renal cyst, patients should consult regular hospitals, actively cooperate with doctors and take treatment measures in order to improve the prognosis.