Hidden pain in the right lung may be caused by trauma, lung disease, pleural disease and so on. 1. Trauma: If you suffer from trauma, it may lead to localized soft tissue contusion and other injuries on the right side, which may cause vague pain on the right side of the lung. 2. Lung diseases: If you suffer from pneumonia and other lung diseases, your lungs may be stimulated by inflammation, which may cause vague pain in the right side of your lungs. 3. Pleural diseases: such as pleurisy, when the pleural cavity is infected by inflammation, it may also lead to vague pain in the right lung. It is recommended that people with vague pain in the right side of the lung go to a regular hospital in time, to clarify the cause of the disease, and to carry out standardized treatment under the guidance of the doctor, so as to avoid the delay in the condition of the body to bring about adverse effects.