Liver cyst is a benign lesion, growing slowly, most of them have no clinical symptoms, and there is no drug to prevent and treat them, only regular review and observation of their growth, generally no big harm will be produced, but if the cyst continues to grow and compress the surrounding blood vessels or bile ducts, it will produce a series of clinical symptoms and have certain harm, serious cases can be life-threatening, and treatment needs to be carried out immediately. The hazards that can be produced by liver cysts are as follows: 1, a few liver cysts grow faster: when the diameter of the cyst exceeds 10 cm, it is easy to cause compression symptoms, and patients can experience nausea, vomiting, right upper abdominal distension, abdominal mass, abnormal liver function, jaundice, etc. 2.Cyst secondary infection: When liver cyst secondary infection occurs, patients may have inflammatory manifestations such as pain in liver area, fever and elevated blood leukocytes. 3.Secondary bleeding in cyst: A few liver cysts may have spontaneous rupture of blood vessels in the cyst wall, leading to bleeding in the cyst. Patients with large amount of hemorrhage will have severe pain in the liver area, which is cool like acute abdomen. 4. Cyst torsion: When torsion of overhanging liver cyst occurs, patients will have severe abdominal pain. Most liver cysts do not have clinical symptoms, so do not worry excessively. Small cysts can be reviewed regularly, and large cysts are treated surgically when necessary.