If patients feel weakness around the body, accompanied by chest tightness and shortness of breath: 1, first of all, we should consider ionic disorders, such as hypokalemia and hyponatremia, which will lead to weakness around the body, accompanied by chest tightness, shortness of breath, palpitations and dyspnea; 2, for endocrine metabolic diseases, such as hypothyroidism, hypoparathyroidism and adrenocortical insufficiency, there will also be weakness around the body, chest tightness and shortness of breath; 3, for patients with a previous history of diabetes mellitus, such as hypoglycemia, unstable angina pectoris, acute carditis and shortness of breath. 3, for patients with a previous history of diabetes mellitus, such clinical manifestations may occur in hypoglycemic reactions; 4, for cardiogenic diseases, such as coronary artery disease, unstable angina pectoris, acute myocarditis, pericarditis, and heart valve disease, such clinical manifestations as chest tightness, shortness of breath, peripheral weakness, and dyspnea may occur; 5, finally, for patients with vegetative nerve disorders, such clinical manifestations may occur in cardiac neurological disorders. The clinical manifestations will also be present in patients with phytodysfunction.