Hidden pain under the right side of the ribs during inhalation may be caused by trauma, chest disease, tuberculosis, or tumors. 1. Trauma: when the patient is in strenuous exercise or has a history of trauma, the hidden pain may be caused by right rib fracture, which is manifested as localized pressure and swelling, and the pain is aggravated by pulling the soft tissues when coughing and inhaling. 2. Chest diseases: If the lungs are infected or non-infectious factors lead to pleurisy, patients will have the clinical symptoms of chest tightness, chest constriction, and pain under the ribs when inhaling. Patients are advised to go to the hospital for early examination and symptomatic treatment. 3. Tuberculosis: when tuberculosis infection invades the pleura and ribs, there will be hidden pain under the ribs when inhaling, accompanied by low-grade fever, night sweating, fatigue and other symptoms, it is recommended to go to the hospital in time for systematic examination and early treatment. 4. Tumor: when the lung tumor metastasizes to the right pleura and ribs, the malignant tumor destroys the local tissues and causes pain. When the patient is accompanied by symptoms such as emaciation, cough, hemoptysis, etc., it is necessary to go to the hospital for lung CT, MRI, etc. as early as possible for early detection and early treatment. There is also a possibility that the right side of the right subcostal pain when inhaling may be liver abscess, cholecystitis, when this symptom occurs, it is necessary to consult a doctor for examination in a timely manner to avoid delaying the condition.