Shortness of breath, fatigue and lack of energy may be caused by physiological reasons such as staying up late and poor sleep treatment, or may be caused by pathological reasons such as anemia, heart disease and lung disease. 1. Physiological reasons: often stay up late, poor quality of sleep leads to sleep deprivation, there will be shortness of breath, fatigue, tiredness and lack of energy symptoms, but through sufficient rest can be improved. 2. Pathological causes: when the patient has a decrease or shortage of red blood cells, excessive destruction of red blood cells or blood loss, anemia-related symptoms will occur, manifested as dizziness, tinnitus, palpitations after activities, shortness of breath, easy to fatigue, shortness of breath, fatigue, lack of energy symptoms. Cardiac diseases such as cardiac insufficiency and myocardial ischemia, as well as pneumonia and chronic obstructive pulmonary disease, may also lead to shortness of breath, fatigue and lack of energy. When patients experience shortness of breath, fatigue, tiredness and lack of energy, it may also be due to other reasons, so it is necessary to consult a doctor to clarify the cause of the disease and carry out treatment.