1. Post ablation syndrome: mainly manifested as fever, pain, etc., rare cases include hematuria, chills, etc., the specific cause is unknown. The main treatment includes strengthening postoperative monitoring, intravenous infusion, pain relief, symptomatic treatment, and regular liver and kidney function testing. 2. Infection: Mainly includes liver abscess, puncture site infection, etc. Prevention: Strict aseptic operation, antibiotics can be used to prevent infection after surgery. 3. Gastrointestinal bleeding: The main cause is bleeding from varicose veins in the lower esophagus or bleeding from stress ulcers. Prevention and treatment: For patients with severe portal hypertension, preoperative management of portal hypertension is recommended; Routine use of antacids after surgery to prevent stress ulcer bleeding. Post bleeding treatment: vital signs should be checked, fasting should be avoided, active volume expansion, intravenous infusion, hemostasis, blood transfusion, acid production, pressure boosting, etc. Endoscopic hemostasis should be performed if necessary. 4. Abdominal bleeding: Clinical manifestations depend on the amount of bleeding. Minor bleeding without obvious symptoms. When there is a large amount of bleeding, there is often bloating and abdominal pain, and in severe cases, cold sweat, decreased blood pressure, and shock symptoms. The main reason is that the tumor is relatively superficial and ruptures after puncture; Or the patient may have poor coagulation function and bleeding at the liver puncture site. Prevention: Strictly grasp the indications, and for patients with poor coagulation function in cirrhosis, correct them before treatment; For superficial lesions, it is best to use laparoscopy or open abdominal visualization. During percutaneous radiofrequency therapy, the number of punctures should be minimized, needle ablation should be performed, and ultrasound or CT scans should be performed again after ablation to rule out the presence of tumor rupture, bleeding, and other symptoms. Treatment: Check vital signs, actively expand volume, administer intravenous fluids, stop bleeding, transfuse blood, increase blood pressure, etc. If necessary, perform surgical exploration to stop bleeding. 5. Tumor implantation: mainly caused by repeated punctures. Prevention: Puncture should be accurately located to avoid repeated punctures; If the needle is inserted too deeply, the electrode needle should not be directly retracted, but should be repositioned after in-situ ablation. 6. Liver failure: The main reason is severe liver cirrhosis and poor liver function before treatment; Or serious complications may occur (such as infection, bleeding, etc.). Prevention and treatment: Strictly control the indications, and cases with Child Pugh C liver function, large ascites, severe jaundice, etc. are all contraindications; After surgery, pay attention to preventing the occurrence of other complications, preventing infections, and actively treating liver protection. 7. Adjacent organ damage: When the tumor is located near the gallbladder, gastrointestinal tract, bile duct, diaphragm, or in the first porta hepatis area, subcapsular area, etc., percutaneous ablation treatment through the puncture pathway may easily cause thermal damage to adjacent organs or vessels. For tumors in these areas, laparoscopic or open surgery under direct visualization should be used as much as possible for radiofrequency ablation treatment, and adjacent organs should be isolated and protected.