Pain in the right upper chest can be attributed to the following causes: first, breast pain, which is more frequent in patients with breast enlargement, and the pain has a certain regularity, especially aggravated in the premenstrual period, while some patients may experience symptoms after exertion or nervousness, which is considered to be related to changes in hormone levels in the body. Second, lung tissue lesions, if a middle-aged or elderly patient with a history of smoking, coughing, coughing and chest pain are not excluded from lung tissue tumors, especially if the lesion involves the wall pleura, the pain is more obvious. Thirdly, some patients can also have pain caused by chest wall diseases, commonly known as costochondritis, which occurs in the 2nd-4th rib cartilage of the anterior chest, and the pain is soreness.