Lack of energy may be caused by cardiac insufficiency, anemia, hypoglycemia and other reasons. If you have cardiac insufficiency, you will usually have edema of both lower limbs, fatigue, shortness of breath after activity, etc. Sometimes it will be manifested as a feeling of lack of energy in the heart or even the whole body, in addition, if you suffer from myocarditis, coronary artery disease and other causes of bradycardia, it will also lead to this kind of situation. Other reasons than the heart can also cause a lack of energy, such as hypoglycemia or anemia, etc. It is recommended to go to the hospital in time for blood glucose, blood tests, etc., and if necessary, dynamic electrocardiograms can also be done. In addition to the above, some menopausal middle-aged women may also experience the above phenomenon due to vegetative nerve disorder, which usually does not require special treatment. If you have no energy in your heart, you can go to the hospital in time and follow the doctor’s instructions for reasonable treatment.