The symptoms of weakness and shortness of breath are easily caused during the recovery period of various chronic and acute diseases, and are more common in chronic respiratory diseases, such as emphysema, chronic bronchitis, tuberculosis, and interstitial pneumonia, as well as poor appetite and coughing, chest tightness, and coughing. At this time, it is necessary to pay attention to diet and rest, and appropriate exercise is needed to improve the body’s resistance. Anemia, hypothyroidism, and heart failure also tend to cause the above symptoms. In case of anemia, oral iron, vitamin B12, folic acid and other drugs should be taken. In case of heart failure, oral cardiotonic and diuretic drugs should be taken, and oxygen should be administered according to the specific situation to relieve the symptoms.