Side effects after radiotherapy for squamous lung cancer mainly include damage to the skin, esophageal mucosa, lung tissue in the radiotherapy area, and possible systemic adverse reactions. Radiotherapy for squamous lung cancer may cause damage to the skin of the body surface in the area irradiated by the rays, and the skin may show changes such as dryness, peeling, localized redness, swelling and pigmentation. In addition, since lung and esophagus are adjacent to each other, the radiation produced by radiotherapy can easily affect the mucous membrane of esophagus, resulting in radiation esophagitis or even perforation of esophagus, in which the patient may suffer from pain in swallowing, difficulty in eating and other symptoms. After radiotherapy for squamous lung cancer, as the lungs are irradiated by rays, radioactive pneumonia can occur, even leading to radioactive pulmonary fibrosis, and patients can have symptoms such as coughing, coughing up sputum, fever, chest pain, chest tightness, dyspnea and so on. In addition, systemic adverse reactions such as bone marrow suppression can occur after radiotherapy. If patients with squamous lung cancer radiotherapy have the above mentioned symptoms, it is recommended to consult physicians and ask them to dispose of them.