Cancer is a systemic disease, which may lead to poor appetite, weight loss, anemia, etc. in the advanced stage. However, if the appetite suddenly becomes better in the advanced stage, it may be due to the improvement of digestive function or the use of appetite improving drugs, such as megestrol acetate, which has the effect of improving appetite for advanced malignant tumors. For end-stage malignant tumors without any effective treatment, the sudden improvement of appetite may be due to the influence of endocrine factors in the body, such as the influence of adrenal hormones, which may lead to the improvement of appetite. It does not mean that the disease has improved, and we still have to observe it later. It is also possible that the inability to eat and the deterioration of the disease may occur again after a few days, which needs to be seen while treatment. Try to increase nutrition and relieve pain treatment for advanced malignancy.