Liver ground glass nodule 4mm is an examination finding of occupying nodule-like changes in the liver, benign nodules, such as liver cysts, cirrhosis, and malignant nodules, such as hepatocellular carcinoma. Patients who find liver nodules need further examination, such as liver CT enhancement examination or liver MRI, liver tumor marker examination, and liver puncture biopsy if necessary, to make a clear diagnosis. For benign liver nodules 4mm, observation and treatment can be carried out, regular review of liver ultrasound or CT examination of the liver, every 3-6 months to observe the changes in the nodules, for patients with malignant liver nodules, surgical resection of the liver is needed for treatment, and pathology biopsy is sent to clarify the nature of the nodules after the operation. Liver nodule patients, usually if there is discomfort, timely to the hospital for examination, do not be careless, so as not to delay treatment.