<s>[INST] My son is 12 years old and got hit by a baseball in the chest tonight.  He was pitching and the ball was hit strait at his chest.  He was pretty shook up and the baseball left a welt but he says he's not having problems breathing.  Is there anything else I should watch for?  If something was going to happen wouldn't it have happened right away?  You just hear so much about kids going into cardiac arrest over things like this. [/INST] Thanks for your question on Healthcare Magic. I can understand your concern. Your son is having blunt chest trauma. Musculoskeletal injury is the most common injury after such trauma. Some serious complications like rib fracture, pulmonary contusion, pneumothorax etc can also occur after blunt chest trauma. But no need to worry for such major complications because he is not having breathlessness. You should watch for coughing, worsening chest pain, breathlessness, redness and swelling on affected areas etc. If any of these is seen then immediately consult doctor and get done chest x ray. Otherwise no need to worry much. He will be alright. And don't worry about cardiac arrest. Hope I have solved your query. I will be happy to help you further. Wishing good health to your son. Thanks. </s>