Most of the causes of vague pain above the right chest are functional diseases of the chest, right-sided costochondritis, mediastinal thymoma and women’s right breast disease, but we can not rule out lung infection, atypical angina pectoris, macrovascular malformation and other diseases. 1. Functional chest diseases: the right side of the limbs for a long time to exercise labor, posture is not correct, or long-term late-night smoking and other stimuli, resulting in the right side of the chest muscle strain appeared in the right side of the chest above the hidden pain, the chest wall muscle and nerve tissue structure is generally no organic changes. 2. Right side costochondritis: right side costochondritis occurs at the junction of 2nd and 3rd rib cartilage and sternum, which often leads to vague pain above the right chest. 3. Mediastinal thymoma: invasive thymoma invading the right subthoracic tissue can also cause vague pain over the right chest. 4. Female right breast disease: such as breast hyperplasia, breast cyst, early breast cancer and other diseases also often cause vague pain above the right chest. 5. Other diseases such as lung infection, atypical angina pectoris, large blood vessel malformation can also cause vague pain above the right chest. It is recommended to go to the hospital for further diagnosis and treatment.