Small hepatocellular carcinoma is generally in the dangerous period within 3 days after surgery, and the patient’s status should be closely observed. Small hepatocellular carcinoma generally refers to single hepatocellular carcinoma with a diameter of 2~5cm, and patients can usually be treated by surgical resection or local ablation. Generally, 3 days after surgery, most of the patients will have symptoms such as elevated bilirubin, elevated transaminases, electrolyte disorders, etc. Blood routine and renal function tests should be carried out at regular intervals. In addition, close attention should be paid to the patient’s vital signs as well as the flow, nature, and color of the abdominal drainage tube. Patients are also susceptible to hypoproteinemia and ascites on the third postoperative day, so their danger period is usually within the third postoperative day. In the 4~5 days after the operation, the patient’s condition is basically stabilized, but attention should be paid to observation. After being discharged from the hospital, they should follow the doctor’s instruction to return to the hospital for regular checkups to monitor the recovery situation. Since liver cancer is more prone to recurrence, it is generally necessary to have checkups every three to four months within two years after surgery, every four to six months after two years, and every six months after five years.