Stabbing pain inside the chest is seen in the following diseases: first, lung tissue infection secondary to pleurisy, the patient will have significant pain, accompanied by coughing, coughing, hemoptysis, and even restricted deep breathing. If the inflammation gradually evolves and exudative pleural effusion worsens, chest tightness will also occur, and anti-infection treatment should be actively administered. Second, patients with cardiac neurosis will have episodes of chest tingling, which can be relieved on their own and can also induce the appearance of symptoms after exertion or emotional excitement. Thirdly, patients with breast hyperplasia will exhibit pain in the chest, with occasional stabbing pains that can also be relieved by themselves, related to abnormal hormone levels in the body, and also related to irregular glandular hyperplasia, and should also pay attention to life conditioning in general.