Radiotherapy for squamous lung cancer may cause different reactions such as skin injury, bone marrow suppression or radiation pneumonitis. 1. Skin injury: in the course of radiotherapy for squamous lung cancer, local radiation therapy will be carried out at the tumor site, so when the radiation directly touches the epidermis, it will cause different degrees of skin pain, inflammation, fever or necrosis, which will lead to different degrees of skin injury. 2. Bone marrow suppression: Since the body will receive radiation during radiation therapy, it will directly affect the hematopoietic function of the bone marrow, which will lead to different degrees of bone marrow suppression after radiation therapy, resulting in anemia, infection, bleeding and other abnormal symptoms of the blood system. 3. Radiation pneumonitis: radiation pneumonitis is a common adverse reaction after radiotherapy for squamous lung cancer, in which radiation causes damage to normal lung tissues, with common clinical symptoms such as coughing, chest tightness and shortness of breath. During radiotherapy for squamous lung cancer, it is necessary to do a good job to protect the body and treat in time if there is any discomfort.