What do you advise if i have chest pain when taking a deep breath?

Reassurance: Chest pain that occurs with a deep breath is generally not of cardiac origin. If you have a past history of lung disease, pneumonia, pleurisy, or other conditions, your symptoms can be residual from that. You may also have musculoskeletal strain that is causing this pain with a deep breath. It possible that you would have a disease like pericarditis, but that is less likely.