The main causes of heart pain during inspiration are as follows: 1. heart causes, the most common disease is acute pericarditis, the typical manifestation is pain behind the sternum or in the precordial region, the pain is related to respiratory movements; some pain is more intense and can radiate to the left shoulder or left upper limb, the pain may be more intense during deep breathing, perfecting cardiac ultrasound helps to make a clear diagnosis; 2. acute pleurisy, the patient appears Pain around the heart during inspiration may be accompanied by coughing, coughing and other respiratory disease manifestations, perfecting chest CT can help clarify the diagnosis; 3, lesions of the chest wall muscles themselves, with inspiration and other respiratory movements muscle strain can also appear pain, the application of pain medication, such as diclofenac sodium symptomatic treatment, can help relieve pain.