Malignant tumors are generally able to eat leeks, but individuals who are in the fasting stage because of surgery or other reasons cannot eat leeks. For patients with malignant tumors, there are no absolute contraindications in terms of vegetables and this kind of food, that is to say, as long as the patient is not in the fasting stage, you can eat leeks or other vegetables that you like to eat properly, to replenish the nutrient tissues needed by the body, which is beneficial to the body to a certain extent. However, if the patient has just undergone surgery, such as gastrectomy, temporarily in the fasting stage, you can not eat leeks for the time being. The development and deterioration of malignant tumors is very likely to endanger the life of individuals, so individuals should have regular medical checkups, and once malignant tumor foci are found in the body, they should be treated as early as possible.