Normal holding a child generally does not cause sternal pain, sternal pain, and the duration of a long time need to consider trauma, thoracic rib arthritis, heart disease. 1. The reason of holding a child: holding a child for a long time produces extrusion effect on the sternum, and the pain and discomfort appears, and disappears soon after lifting the extrusion. 2. Trauma: If the sternum is squeezed or hit, it will cause soft tissue damage and sternal injury, which may also cause pain. 3. Thoracic rib arthritis: this is a common cause of pain in the sternum area, mostly caused by pathogenic microbial infections or injuries, and the pain is aggravated by localized pressure. 4. Heart disease: for example, myocardial ischemia, myocardial infarction, etc., can also radically cause sternal pain, accompanied by chest tightness and discomfort. If the sternal pain may be caused by a variety of conditions, try to go to the hospital to identify the cause of timely treatment.