The sense of taste can generally be restored after radiotherapy for lung cancer. When the dose of radiotherapy for lung cancer accumulates at the same time, the taste sensing cells on the tongue are gradually damaged, and the cells that feel salty and bitter taste have the strongest sensitivity to the rays, resulting in no taste in the mouth. Generally, the sense of taste can be recovered gradually after radiotherapy, but the specific recovery time is different from person to person. It is especially important for lung cancer patients to take care of their diet during radiotherapy, pay attention to nutritional matching, balance dietary structure, give high protein, high vitamin, light and easy to digest food, and avoid too raw, cold and hard food, which is not conducive to the repair of gastric mucosa and oral mucosa. After radiotherapy, patients can eat umami, plums, mushrooms, onions and other foods that stimulate the sense of taste. It is recommended that patients consult the attending physician to know the methods that can help the sense of taste to recover, and at the same time follow the doctor’s instructions to actively treat lung cancer.