The causes of pain in the right lung without coughing include physiological causes such as over-exertion and pathological causes such as pleural diseases, rib injuries and lung tumors. 1. Physiological causes: when engaging in heavy physical labor or staying in the same position for a long time, it can lead to excessive pulling of the chest muscles, resulting in pain in the lungs, but it is not accompanied by coughing, and is mostly relieved after rest. 2. Pathologic causes: (1) Pleural diseases: including pleural inflammation, pleural effusion and so on. Inflammation of pleura can appear fever, chest tightness, lung pain, etc., mostly due to pathogenic bacteria infection. Pleural effusion refers to the accumulation of fluid in the pleural cavity, which can be manifested as chest distension, chest pain, etc. It is mostly secondary to other diseases, such as secondary to pneumonia and lung cancer. (2) Lung tumor: mainly refers to malignant tumors, the tumor invades the pleura or lung tissues, which can produce lung pain, some patients do not involve bronchial tubes, which can be manifested as not coughing and not coughing up sputum. (3) Myocardial ischemia: right-sided chest pain can not be completely excluded from atypical angina pectoris, mostly associated with activities, emotional excitement and other triggers. (4) Rib injury: it is the interruption of rib continuity due to violent injury or pathologic fracture, etc., which may present with lung pain and activity limitation. If there is pain in the right lung but no cough, there may be many other causes, such as pulmonary vascular disease, and it is necessary to go to the hospital in time, and be treated by the doctor after identifying the cause, so as not to delay the condition.