If you feel unwell, you need to identify the cause of the discomfort and then take the right medication, you can take some oral medication at home and observe the situation. The most common cause of discomfort is the flu, which is caused by infection with bacteria, viruses or pathogenic microorganisms, so you should stay in bed immediately, drink plenty of warm water, keep warm and get plenty of rest. At this time, you should eat a light diet, low sugar, low fat, low salt diet, and also eat more fruits and vegetables rich in vitamins and trace elements, and you can take certain cold medicine, such as oseltamivir and other drugs to observe the situation, if the discomfort is relieved, usually the problem caused by the cold is not serious. If there is chest tightness, shortness of breath, precordial discomfort and other uncomfortable situations, you can take 2-4 capsules of nitroglycerin under the tongue at home and observe for 30 minutes to see if the uncomfortable situation is relieved, if it is relieved, it proves that it is due to myocardial ischemia and cardiogenic factors, but if it is uncomfortable for a long time, it is recommended to call 120 to seek medical attention.