Liver and kidney cysts are common benign lesions in clinical practice, and most patients do not have any symptoms, usually found during ultrasound or CT examination. Some people may be nervous after finding liver and kidney cysts during physical examination, especially because they feel that it is always a bad thing to have something “growing” on the liver, and they worry that one day it will become malignant and try every possible way to get treatment. In fact, this worry is completely unnecessary. The majority of liver and kidney cysts are congenital, that is, they are born with no symptoms, and although they grow slowly, they are very slow and basically do not become malignant, so they usually do not need to be treated. Only when the cyst is large enough (usually larger than 5 cm) to cause pressure symptoms or hidden pain in the relevant organs, it is treated. In the past, surgical treatment was needed, such as window debulking and internal drainage, but nowadays, the treatment can be achieved by minimally invasive interventional methods, which are simple, safe and effective, and very inexpensive. Specifically, under the guidance of ultrasound or CT, the cyst is punctured with a special trocar needle and the cyst fluid is sucked out, then a certain amount of anhydrous alcohol is injected into the cyst cavity to “burn” the epithelial cells that secrete cyst fluid on the cyst wall, so that the cyst will become smaller and no longer grow, in case it is not complete, the treatment can be repeated, and generally a single cyst is treated 1 to 2 times is enough! In case of multiple foci, treatment can be divided into several sessions.