The common causes of nodules on the liver include hepatic hemangioma, hepatic cyst, hepatic malignant tumor, and other diseases. 1. Hepatic hemangioma: it is a benign tumor of liver originated from endothelial cells of blood vessels. Clinically, hepatic cavernous hemangioma is the most common. Most patients do not have obvious symptoms, such as abdominal discomfort, pain, vomiting and other symptoms in large size. 2. Liver cysts: a kind of common benign liver lesions, clinically, congenital liver cysts are more common, and some patients are caused by parasitic infection and other factors. Patients are usually asymptomatic. If the volume is large, nausea and vomiting, right upper abdomen pain and other discomforts. 3. Hepatic malignant tumor: refers to malignant tumor of liver, including primary liver cancer and secondary liver cancer. Common clinical manifestations include abdominal pain, abdominal mass, jaundice, emaciation, accompanied by nausea and vomiting, loss of appetite, generalized pain and other discomforts. 4. Other diseases: focal hyperplastic liver nodules, cirrhotic nodules, etc. can appear on the liver with small nodules. There are many reasons for small nodules on the liver, and you should consult a doctor in time to avoid delaying your condition.