Left liver cyst is a benign disease, so it has no clear preventive measures. Specifically: 1. small cysts: when there are no symptoms, there is no need to deal with them, and they can be observed regularly and detected by ultrasound and CT; 2. large cysts: puncture, drainage and dialysis can be performed, including sclerotherapy, such as playing polyglactin to make them harden; however, the possibility of recurrence is higher in such patients; 3. surgical treatment: when the symptoms are particularly serious and affect the quality of life, simple resection of liver cysts can be performed, but resection However, there are more recurrences in the short term, and the ultrasound should be observed regularly. So far there is no clear and particularly effective way to prevent liver cysts. Patients with liver cysts should not be overly anxious and nervous, but should be observed regularly.