There are differences in the understanding of the chest in the south and north and in some areas, some chests correspond to the precordial area about below the left nipple, and some chests are understood to be under the saber, below the sternum in the stomach and epigastric region. The reason for the difference is: 1, if the precordial area beating, the physiological situation is seen in relatively thin people, emotional excitement, strenuous exercise, etc. after the heart contraction enhanced or increased. 2, the precordial area beating pathological disease is seen in hyperthyroidism, hypertensive heart disease, arrhythmia, rheumatic heart disease mitral stenosis and other heart contraction enhanced over increased, in addition to the heartbeat accompanied by precordial tremor feeling combined with activity after weakness 3.If it is a heart fossa and stomach beating, the normal situation is seen in thin people without underlying diseases and any symptoms, with less subcutaneous fat in the abdomen, and the abdominal aortic pulsation drives the abdominal beating, which is more obvious when lying down. 4.If it is a heart fossa and stomach beating, if there is a history of hypertension, arteritis and other diseases, with symptoms such as chest and abdominal pain, panic, abdominal tearing, etc., it should immediately go to hospital to rule out dangerous diseases such as aortic coarctation.