Surgery is the first choice for lung cancer treatment, but if the best time for surgery is missed, gamma knife radiation therapy is also an important treatment method. Many patients are worried about the side effects of Gamma Knife treatment before they undergo Gamma Knife. The following is a detailed description of the side effects of gamma knife treatment for lung cancer. In order to solve patients’ doubts, the following side effects are not common to everyone. The following side effects do not occur for everyone. As long as the treatment plan is properly formulated, the side effects of gamma knife treatment can be minimized. Therefore, in order to prevent the occurrence of side effects, it is necessary to choose a regular and authoritative hospital and a professional physician for treatment. (1) Radiation pulmonary fibrosis Radiation pulmonary fibrosis mostly occurs several months after adequate radiotherapy for lung cancer. The main symptoms are shortness of breath, dry cough, fever and yellow sputum when secondary infection is caused. (2) Hair loss Some patients may suffer from different degrees of hair loss as a result of radiotherapy to the head. According to Chinese medicine, radiotherapy is a heat and poisonous evil, which easily damages yin and consumes qi. The simultaneous application of TCM treatment during lung cancer radiotherapy can achieve the purpose of both local and body treatment, and also reduce the side effects of lung cancer radiotherapy and achieve better therapeutic effect. (3) Radiation pneumonia Acute radiation pneumonia mostly occurs at doses above 40Gy. The main symptoms are cough, chest pain, shortness of breath and fever, and severe respiratory distress.