Hidden pain on the right side of the chest is usually due to musculo-neurological lesions of the chest wall on the right side of the chest, right-sided breast disease, cardiopulmonary mediastinal disease and upper gastrointestinal tract disease. 1. Chest muscle and nerve tissue lesions on the right side of the chest wall (1) functional lesions: chest wall muscle soft tissue injury, the right side of the limb long-term exercise labor, or long-term late night smoking and other stimuli, resulting in the right side of the chest muscle nerve tissue chronic strain injury, thus causing the right side of the chest hidden pain. (2) right costochondritis, right intercostal neuralgia and other inflammatory lesions can also lead to the right side of the chest pain. 2. Female right breast disease: such as breast hyperplasia, breast cysts, early breast cancer and other diseases often cause vague pain on the right side of the chest. 3. Cardiopulmonary and mediastinal diseases: atypical angina pectoris, large blood vessel malformation, lung infection, pleurisy, lung cancer, mediastinal thymoma, etc. invading the right side of the right post-sternal tissues and structures can also lead to vague pain on the right side of the chest. 4. Upper gastrointestinal diseases: reflux esophagitis, acid reflux, liver and gallbladder diseases, etc. can cause pain on the right side of the chest. It is recommended to go to the hospital for further diagnosis and treatment.