Generally speaking, double kidney cysts 3mm will not affect the life span of the organism, and patients can be reviewed regularly. Renal cyst is a common acquired formation of a kind of kidney structural abnormalities, the first in the renal tubular diverticulum, can be single or multiple. Most of the double kidney cysts have no special symptoms, and 3mm double kidney cysts have no obvious damage to kidneys and can be reviewed regularly by kidney ultrasound. If patients have back pain and abnormal urination, and the cysts are more than 5cm in diameter, they are easy to compress the kidneys, causing a higher risk of bleeding and infection, and need to be treated by minimally invasive surgery. For cysts less than 5cm in both kidneys, painless and benign, they usually do not need treatment. In addition, patients with double kidney cysts can be regulated by traditional Chinese medicine in daily life, and pay attention to abstaining from spicy and stimulating food, drinking more water and limiting salt intake to no more than 6g per day.