Renal cyst is a common kidney disease that can occur in both men and women, at any age, and is rare in children, with an incidence rate of about 1.6:1~1.8:1 for men and women. Renal cysts are the most common structural abnormality of adult kidney, which can be unilateral or bilateral, one or more, with a diameter of about 2cm, and there are cysts with a diameter of up to 10cm, which are mostly found in males. The incidence is increasing with age. Clinical simple renal cysts are more common, the vast majority of non-genetic diseases, a very small number of autosomal dominant inheritance. In adults, the incidence increases with age. Early stages are usually asymptomatic and are often discovered by chance. Larger cysts may be associated with flank or back pain and microscopic hematuria. Simple renal cysts are mostly single, or multiple, or even bilateral. The examination is mainly urological ultrasound, abdominal CT and so on. If you find kidney cysts need to go to the hospital, complete the examination and choose the treatment plan under the guidance of the doctor.