There are many reasons for liver cancer recurrence one month after surgery, the common ones are liver cancer metastasis before surgery, incomplete surgical treatment and poor immune function. 1. Liver cancer metastasis before surgery: when liver cancer invades into surrounding tissues and metastasizes to distant places before surgery, which cannot be shown by imaging examination, surgery cannot completely remove the cancer cells, and the missed liver cancer tissues proliferate rapidly, causing liver cancer recurrence. 2. Incomplete surgical treatment: the liver cancer lesion is not completely removed during surgery, resulting in the cancerous tissues remaining in the body, due to the fast growth of the cancerous tissues, recurrence may occur after one month. 3. Poor immune function: since the patient’s immune function is poor, combining chemotherapy or radiotherapy with surgical treatment can lead to even lower immune system, and if the patient does not pay attention to the conditioning after surgery, it can also lead to rapid recurrence of the disease. There may be other reasons for recurrence one month after surgery, such as unreasonable treatment method. It is recommended to make comprehensive judgment to evaluate the condition before surgery and treat the disease at an early stage. After surgery, pay attention to reasonable diet, keep happy mood, and have regular checkups and follow-ups.