<s>[INST] my son had pain in the middle of his chest for like a minute, i asked him what was he feeling and he said that his heart was beating fast and his was like mom maybe a bone is loose in there or something but he was fine not even ask me for tylenol or anything. what should i do? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Chest pain and rapid beating of heart (tachycardia) in young patient are mostly due to arrhythmia (rhythm disturbances in heart). So consult cardiologist and get done 1. ECG 2. 2d echo 3. Holder monitoring (24 hours continuous recording of ECG). If all these are normal then no need to worry about heart diseases. Sometimes, stress and anxiety can also cause similar symptoms in young patients. So ask him to avoid stress and tension, be relaxed and calm. Don't worry, he will be alright. But first rule out arrhythmia. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>