The dangers of pectus excavatum can generally be divided into two aspects: one is the harm to the physiological functions of the patient, and the other is the psychological impact on the patient. The physiological harm can be further divided into two categories: one is the impact on lung function, and the other is the impact on heart function. We can imagine that in normal individuals, the sternum is positioned in front of the heart and lungs. However, in patients with pectus excavatum, due to congenital hereditary or genetic factors, the sternum is pushed backward towards the spine, compressing inward and backward, which causes the heart to be squeezed, deformed, and the lungs to be compressed, preventing them from fully expanding. Thus, both the heart and lungs of the patient are subjected to certain pressures, affecting both cardiac and pulmonary functions. In addition to the impact on cardiopulmonary function, the patient's thoracic cage is deformed. It appears as if the center of the chest has been punched in. This kind of deformed chest affects the patient's social abilities, including interactions with potential boyfriends or girlfriends. Imagine, for instance, removing one's shirt at the pool in summer, attracting stares as if one were a monster. Therefore, patients may lack confidence, especially in romantic and social interactions, and some may even experience certain levels of depression or suicidal tendencies.