Focal necrotic nodules in the right liver can be seen in liver inflammation, trauma, intrahepatic vascular malformations, and taking cholesterol medication. 1. Liver inflammation, trauma: due to the role of inflammation, trauma and other factors, resulting in a limited reduction of intrahepatic blood supply, so that the vascular malformation is proliferative development, and then the formation of focal necrotic nodules in the liver. 2. Intrahepatic vascular malformations: Intrahepatic vascular malformations lead to over-perfusion of blood flow in local liver tissues, resulting in limited hyperplasia and formation of focal necrotic nodules in the liver. 3. Taking cholesterol medication: This is related to the stimulation of liver cell proliferation by cholesterol medication. 80% of patients with focal necrotic liver nodules have a history of taking oral contraceptives, and the continued use of cholesterol medication will also cause focal necrotic nodules to further increase in size. Focal necrotic nodules on the right side of the liver should be promptly consulted in the hospital to determine whether they are benign or malignant, and common examination methods include liver enhancement CT, MRI, and liver puncture biopsy. Treatment should be carried out after clarification through examination to avoid progression of the disease.