The precautions for liver cyst are as follows: 1. If the diameter of liver cyst is <5cm and there is no clinical symptom, it can be reviewed once every six months and no special treatment is needed; 2. If the diameter of liver cyst is close to 5cm, it is recommended to be reviewed once every three months; 3. If the diameter of liver cyst is >5cm or clinical symptoms appear, percutaneous hepatic puncture cyst aspiration should be given for treatment and anhydrous alcohol should be injected into the cyst cavity to destroy the cyst wall and prevent cyst regeneration to achieve complete cure.