The reasons for the protrusion of sternal raphe may include thinness, congenital developmental abnormality, deformed healing after trauma, costochondritis and so on. 1. Thinness: some patients are too thin, so the sternocleidomastoid protrusion will appear to be more prominent from the appearance. If there is no symptomatic manifestation in this case, there is no need to carry out special treatment, only need to carry out continuous observation. In the usual diet, more nutritional intake is needed. 2. Congenital developmental anomalies: this may also be due to congenital developmental anomalies, if there is no obvious appearance of deformity, there is no need for surgical correction. 3. Post-traumatic deformity healing: If the fracture of the sternal raphe is caused by trauma, if it is not well treated, the raphe will undergo deformity healing, resulting in an increase in the production of localized bone scabs, which will make the localized sternal raphe protrude. If there are no other accompanying symptoms, you can observe first. 4. Costochondritis: if the patient has costochondritis, causing the protrusion of the raphe to be more obvious, in this case, effective anti-infection treatment is needed. If the patient’s sternal protrusion, should consult a doctor in time to find the cause of the disease, for different causes to take different solutions.