Liver cysts are one of the very common benign lesions of the liver. Generally speaking, based on the different causes of liver cyst development, liver cysts can be divided into two types: non-parasitic liver cysts and parasitic liver cysts cysts. Clinically, non-parasitic liver cysts are the most common, so let’s learn what are the common causes of various liver cysts? 1, non-parasitic liver cysts are most commonly seen in congenital liver cysts, generally common in solitary liver cysts and multiple liver cysts. The epithelial cells within the cysts can be shown as columnar or cuboidal, and the cyst fluid is mostly clear and bright liquid without bile. Among them, non-parasitic liver cysts can also be due to acute inflammatory changes in the liver such as liver abscess, liver malignancy or hepatocyte repair process after liver trauma and then form cystic lesions. However, congenital liver cysts are still the most common in clinical practice. Smaller hepatic cysts usually have no obvious clinical symptoms and can be left untreated. For larger liver cysts with obvious symptoms, ultrasound-guided liver cyst aspiration or laparoscopic liver cyst opening and drainage can be used. 2.Parasitic liver cysts are most common clinically as liver cysts. After people mistakenly eat the eggs containing parasites, the parasites can enter the portal vein through the mucosal vein and flow into the liver, which can form liver cysticercosis in the body. In the early stages of the disease, there are no obvious clinical symptoms, but in the middle and late stages, patients develop abdominal pain, abdominal distension and obstructive jaundice, and only when they go to the hospital can they be diagnosed with liver worm disease. Most patients with hepatocystis can be treated well after surgical removal.