The indications of anhydrous alcohol ablation are as follows: First, liver cysts, because the patient’s physical condition is not good enough to tolerate the operation, at this time, the cystic fluid in the liver cyst can be aspirated under ultrasound guidance, and the anhydrous alcohol injected into the cyst can play a role in destroying the cystic wall of the cyst, thus promoting the cystic wall of the cyst to develop aseptic necrosis, self-absorption and atrophy, and avoiding the volume of the hepatic cyst from increasing progressively, resulting in local compression symptoms. Second, patients with liver malignant tumor, after surgical resection of the tumor, the liver tumor recurs again, at this time, the trauma of surgery again is large and intolerable, you can locate the tumor through ultrasound or CT, injecting anhydrous alcohol into the malignant tumor of the liver to kill the tumor cells, prompting the tumor cells to necrotic, slowing down the growth of the tumor cells and prolonging the life of the tumor can play a better therapeutic effect. In some patients, if too much anhydrous alcohol is injected, it may cause obvious local pain, and symptomatic supportive treatment is needed.