Body wasting and shortness of breath may be related to the individual’s physique without organic diseases, or it may be related to digestive system diseases, lung diseases and tumor diseases. 1. Digestive system diseases: for example, enteritis, gastritis, duodenal ulcer, gastric ulcer and so on. These diseases will affect the intestinal nutrient absorption and easily cause malnutrition, which will lead to wasting and shortness of breath. 2. Lung diseases: for example, pneumonia, tuberculosis, emphysema, pulmonary fibrosis, etc., which can easily cause dyspnea, shortness of breath, chest tightness and other symptoms. Some patients have a long period of illness, which may cause symptoms such as physical weakness and emaciation. 3. Tumor diseases: for example, stomach cancer, lung cancer, liver cancer, kidney cancer, bone cancer, etc. These diseases will cause emaciation and shortness of breath. After the disease progresses further, symptoms such as weakness, bone pain and enlarged lymph nodes may appear. In addition, metabolic diseases such as hyperthyroidism and diabetes can also cause shortness of breath, so it is recommended that patients should consult a doctor in time and under the guidance of a professional physician, undergo relevant examinations to analyze the causes and then treat the symptoms.