Calcification of 4mm in the liver consider liver and gallstones, chronic inflammation of the liver, parasitic infections, benign and malignant tumors of the liver and other possibilities. 1. Liver and gallstones: stones in the liver and gallbladder will cause calcification in the liver area, which needs to be reviewed regularly to avoid further development of the stones. 2. Chronic inflammation of the liver: Liver tuberculosis or liver abscess can cause calcification on imaging images due to long-term chronic inflammatory reaction in the liver. 3. Parasitic infections: Liver parasitic diseases can also appear as calcified foci on imaging images, mostly in patients with schistosomiasis and encapsulated disease. 4. benign and malignant tumors: benign and malignant tumors of liver or intrahepatic metastases can be seen as calcified foci on imaging, which need to be combined with symptoms and signs and improve the diagnosis of relevant auxiliary examinations, and cannot be based on calcified foci as the basis of diagnosis. There are other causes of 4mm calcification in the liver, if the examination found 4mm calcification, it is recommended to consult a doctor in a timely manner, with the help of the doctor to clarify the cause of the disease, and targeted treatment or therapy.