It does not usually matter if there are cysts in the kidney, but the exact size and number of cysts need to be judged. Kidney cyst is the most common kind of structural abnormality in adult kidney, which can be unilateral or bilateral, one or more, and the diameter is usually about 2cm. If it is a single kidney cyst, less than 5cm in diameter, without urinary frequency, urinary urgency and lumbar pain, it is usually not serious and does not require clinical treatment, and regular review is sufficient. If the kidney cyst is larger in size, larger than 5cm or more, compressing normal kidney tissues or recurrent urinary tract infection, etc., active symptomatic treatment is recommended, such as renal puncture and drainage or renal cyst decompression and other treatments can be performed. A small number of people may have huge kidney cysts, which may cause compression of the kidney and surrounding organs and may cause abdominal masses and abdominal pain, but they are not more dangerous and can be treated by timely surgery.