Conversation: The conversation between human and AI assistant.
[|Human|] My son is going to be 16 in 20 days. He said that while sitting at school his heart started beating fast and he felt tightness. It happened before and he said it felt like heartburn. Hes also been having knee pains. Which I think its from jumping a wall onto the pavement to go to school.
[|AI|]  Hello! Thank you for asking on Chat Doctor! These symptoms seem to be related to anxiety. Does he have any bumps or swelling in his knees? An immunological disorder affecting the joints and the heart could mimic this clinical scenario. I recommend consulting with the GP for a careful physical examination, a resting ECG, a chest x-ray and some blood lab tests: - complete blood count- PCR, sedimentation rate, fibrinogen-liver and kidney function gets- thyroid hormone levels-anti streptomycin O tier - blood electrolytes. If all the above tests result normal, the most probable diagnosis would be just pure anxiety. Hope to have been helpful! Best wishes,