Winter is a high incidence season for cardiovascular diseases. Due to the cold weather, vasoconstriction, low water intake and viscous blood, patients are prone to acute myocardial infarction. Some patients have a previous history of coronary angina, while others do not have a history of angina at all, but first present with acute myocardial infarction. Therefore, in winter, patients should keep warm to avoid getting cold, drink more water to avoid thick blood, avoid overexertion, emotional excitement, overeating, and keep bowel movements smooth, especially for patients with hypertension, hyperlipidemia, diabetes, obesity, and patients with angina pectoris should pay more attention, should actively control the original disease, and should have some nitroglycerin, quick-acting heart pills and other emergency drugs around. When a patient has persistent chest pain that cannot be relieved for more than 20 minutes, acute myocardial infarction should be suspected, and some patients show stomach pain, vomiting, toothache or tightness in the precordial area. When a patient has persistent chest pain that cannot be relieved, he or she should remain sedated and avoid activities; family members should not panic and call “120” while giving the patient sublingual nitroglycerin or quick-acting heart pills. Many patients and family members panic and don’t know how to deal with the above emergency, and some patients and family members don’t go to the hospital in time when they have chest pain, or don’t accept the doctor’s suggestion for reperfusion (coronary intervention or thrombolysis, etc.) treatment after going to the hospital, which delays the best treatment time. After the danger period is over, follow the doctor’s advice and take medication for a long time, and have a low-fat and low-salt diet, eat less and more meals, have fine and soft food, and avoid dry stools.