Dietary contraindications after chemotherapy for early stage of lung cancer are mainly to minimize the consumption of too greasy and fried food, too sweet food, spicy and stimulating food, raw and cold food and so on. 1. After chemotherapy for early stage of lung cancer, do not eat too greasy food, because lung cancer patients may have serious gastrointestinal reactions during chemotherapy, and the patients themselves may have nausea, vomiting, loss of appetite, etc. If the food is too sweet, the patients should not eat too much greasy food. 2. Too sweet food may lead to aggravation of gastrointestinal symptoms. At the same time, there may be increased cough and phlegm and other discomforts. 3. Do not eat spicy and irritating foods, which may lead to further aggravation of the patient’s coughing symptoms. 4. Don’t eat raw and cold food, which may lead to bacterial infection and aggravate the discomfort caused by chemotherapy. Because chemotherapy for lung cancer may cause discomfort in gastrointestinal tract and other parts of the body of the patient, careful dietary regulation will be more helpful for the relief of the disease.