The precautions for liver cysts are as follows: 1. If the diameter of liver cysts is <5cm and there is no clinical symptom, it is enough to review the cysts every half a year, and there is no need for special treatment; 2. If the diameter of liver cysts is close to 5cm, it is recommended to review the cysts every 3 months; 3. If the diameter of liver cysts is >5cm or there is a clinical symptom, percutaneous hepatic perforation cyst aspiration should be given to treat them, and at the same time, the anhydrous alcohol should be injected into the cavity of the cysts to destroy the cyst wall and prevent cysts from regrowing, so that the purpose of a complete cure can be achieved.