Patients with advanced liver cancer may experience facial swelling, which can be attributed to the following reasons: Firstly, patients with advanced liver cancer often show significant disease progression and may develop complications associated with hepatorenal syndrome. Clinically, this can manifest as reduced urine output, anuria, and even renal impairment, leading to facial swelling. Secondly, in patients with advanced liver cancer, there may be metastasis to cervical lymph nodes. Enlarged lymph nodes can compress or invade surrounding structures, leading to superior vena cava syndrome. Once this syndrome occurs, patients may experience swelling in the face and neck, and some may even face severe breathing difficulties. Lastly, some patients with advanced liver cancer may experience renal damage due to the toxic side effects of antitumor treatments or medications. Clinically, this can lead to increased levels of blood urea nitrogen and creatinine, reduced urine output, and hypoproteinemia, which may also result in facial swelling.