Cysts are a benign condition that manifests as a cystic mass with liquid contents that can grow on the surface of the body, or on organs or other parts of the body. Most cysts are not serious, especially on the surface of the body, while a few organ cysts may be more serious. Body surface cysts commonly include tendon sheath cysts and sebaceous cysts, while ovarian cysts, liver cysts, and kidney cysts are common in the body. The development of this disease is more limited and usually does not expand indefinitely or appear to compress local tissues or blood vessels. However, if the volume of the cyst is >10cm and it grows in the internal organs, it may cause compression symptoms, such as jaundice when the cyst presses on the liver, or a feeling of fullness when it presses on the intestines and stomach. Smaller cysts that do not cause discomfort usually have less impact on human health and do not require special treatment. Regular checkups should be performed to see if the cyst has changed in size, and if discomfort occurs, go to the hospital in a timely manner. If the cyst has localized pressure symptoms or leads to local inflammation, usually choose to incise and drain the way of treatment. If the huge cyst compresses the liver or kidney and other internal organs, then it is more serious and requires surgery to remove the cyst to avoid affecting the function of the liver or kidney. In addition, there is another condition that requires attention, namely polycystic liver and polycystic kidney, which are usually hereditary diseases with no effective treatment and ultimately require organ transplantation.