If the patient has heart pain when taking a deep breath, you can go to the hospital to find out the cause and then proceed with the treatment method to relieve it. You can also use nitroglycerin at home by yourself and observe whether the heart pain is relieved. If it is not relieved, you must go to the hospital for consultation and oxygen therapy at the same time. If you have a home oxygen machine, oxygen bag or oxygen bottle at home, you can first inhale oxygen for 15-30 minutes and observe whether the heart pain is relieved. If there is no obvious relief after all the above treatments, you must go to the hospital for 18-lead ECG examination and myocardial enzymology examination to observe whether there is high-risk chest pain, and if there is high-risk chest pain, you must be hospitalized for systematic treatment.