Liver cysts are divided into many types, such as parasitic liver cysts, non-parasitic liver cysts and other types, such as the occurrence of parasitic liver cysts, is the need for treatment, such as compliance with the doctor’s instructions to use drugs such as albendazole for treatment, and non-parasitic liver cysts 18mm generally do not need to be treated, and regular review can be. Liver cysts are a relatively common benign liver lesion, patients will not show any clinical symptoms when the cysts are small, but when the cysts are large, patients may experience discomfort in the liver area. Non-parasitic liver cysts of 18mm are not very large liver cysts and do not meet the clinical indications for surgical treatment, so treatment is generally not necessary and regular liver ultrasound review is sufficient. Patients are advised to go to the Department of Hepatobiliary Surgery or the Department of Gastroenterology in regular hospitals to clarify the type of cyst with the help of a doctor in order to determine the next step of treatment.