Most renal cysts are benign and are usually rarely cancerous. Renal cysts are pathologic dilatation of renal tubules, forming cystic lesions. It is usually caused by a variety of factors such as bad habits in life and various infections, and the chance of malignant lesions is very low. Generally speaking, patients with renal cysts less than 5 centimeters in diameter and without symptoms and complications do not need treatment, but will be followed up and observed regularly. If the cysts show symptoms such as swelling and pain, it is necessary to choose appropriate ways of treatment in time according to the size, number and nature of the cysts. Patients with renal cysts need to pay attention to the changes of their body in their normal life, if there is any discomfort, they should go to the hospital in time for relevant examination, and choose the appropriate way of treatment under the advice and guidance of the professional doctors, and treat it as soon as possible.