Whether or not a thoracic deformity can be left untreated will depend on the patient’s specific situation. If the deformity is caused by congenital factors, it is possible that the fetus has not yet perfected its development. If the deformity is not serious, it can be observed without treatment, and some children can gradually improve as they grow and develop. If the deformity is caused by a disease and symptoms such as coughing, coughing and breathlessness are present, treatment is required and the primary disease should be actively treated to avoid affecting the patient’s heart and lung function.