Foods avoided by lung cancer patients include spicy and stimulating foods, high salt diet, don’t smoke, and don’t eat more barbecue and deep-fried foods. 1. Spicy and irritating food: lung cancer patients should not eat irritating and spicy food such as chili pepper, pepper, raw garlic, raw onion, mustard, white wine, etc. Lung cancer patients are prone to aggravate their condition by eating these foods. 2. High-salt diet: for example, pickles, salted eggs, etc. Eating more of these foods will easily aggravate the symptoms of coughing and spitting. 3. Lung cancer patients should not smoke, as smoking is one of the causative factors of lung cancer and will aggravate the condition. Pay attention to the safety of environment and do not inhale harmful air. 4. Barbecue, deep-fried and smoked food: Lung cancer patients should not eat fritters, deep-fried fish and smoked food to avoid aggravating the condition. If lung cancer patients’ condition is aggravated because of improper diet, they should contact with doctors in time and follow standardized treatment under the guidance of physician’s interview, and patients should not eat indiscriminately.