Angina pectoris is divided into stable angina pectoris and unstable angina pectoris, the former can be relieved quickly through rest or sublingual nitroglycerin, the latter suggests that the vascular lesions are serious and unstable, rest or nitroglycerin and other drugs may not be effective, and it is often necessary to go to a regular hospital in a timely manner to ask the doctor to give treatment in order to avoid delays in the condition. 1. Stable angina is usually caused by physical labor or emotional excitement, and usually lasts for a short period of time. The pain can be relieved by rest or the use of drugs that dilate the coronary arteries, such as nitroglycerin. 2. Unstable angina, lasting for a long time, when the symptoms are not relieved by resting or taking nitroglycerin, you need to actively go to the hospital for consultation and treatment. Doctors will choose conservative treatment with medication or surgery according to the condition and physical status. 3. For acute angina, drugs such as nitroglycerin and isosorbide nitrate are commonly used. For angina in remission, calcium channel antagonists (nifedipine, etc.), beta-blockers (propranolol, etc.), antimyocardial ischemic drugs (trimetazidine, etc.), and antiplatelet drugs (aspirin) are also used. For patients with severe conditions, surgical treatment, such as percutaneous coronary intervention, coronary artery bypass grafting, etc., is required. If angina pectoris occurs and pain relief is not effective after rest or sublingual nitroglycerin, the patient should consult a doctor in time to avoid delay.