What should you do if the side of your lung hurts when you breathe heavily?

If you experience pain in the side of your lung when breathing heavily, it's important to seek medical attention to determine the underlying cause. Possible reasons for this discomfort could include muscle strain, pleurisy, or other respiratory issues. In the meantime, avoid activities that exacerbate the pain and consider using over-the-counter pain relief. However, a healthcare professional can provide a proper diagnosis and treatment plan.