There are several factors for the body to feel weak around the body as follows: 1. From the perspective of Western medicine, the most common factors are the insufficiency of blood supply to the heart and chronic heart failure. When the heart blood supply is inadequate, especially coronary artery blood supply, it will cause weakness, weakness, chest tightness, shortness of breath, palpitations and other clinical symptoms. In severe cases, respiratory failure or heart failure can lead to a significant increase in the symptoms of weakness and lack of energy. 2. Chronic pulmonary heart disease, pulmonary hypertension and pulmonary insufficiency can also lead to clinical symptoms of weakness. 3. Metabolic diseases, such as hypokalemia and hyponatremia, may also cause the clinical symptoms of weakness.