There are a variety of causes that can lead to the bulging of the sternal stalk position, and it is generally considered to be the result of thoracic deformities, old injuries to the sternum, and overly thin people. It is necessary for physicians to take appropriate treatment measures and methods according to the different causes of the patients. 1. Thoracic deformity: if the patient has scoliosis, which can lead to thoracic deformity, or rickets due to acquired development, which can form chest deformity such as chicken chest, funnel chest, and so on, at this time there can be a protruding sternal handle and other manifestations. 2. Sternum old injury: patients with previous chest fracture and other conditions can be left after the recovery of this deformity, or due to localized excessive bone hyperplasia and appear. 3. Excessively thin people: when the human body is overly dieting, weight loss and other factors can cause malnutrition, malnutrition can occur after the reduction of subcutaneous fat, which can lead to the protrusion of the sternal handle. In addition to the above causes or triggers, there are many other causes that can lead to, need to go to the hospital to diagnose the cause of the disease after treatment.