The body fatigue can be caused by overworking. Long time overworking can lead to body fatigue, which can be improved by proper rest. Tiredness can also be seen in the early manifestation of tumor patients. The high metabolism of tumor can lead to fatigue and can be accompanied by symptoms such as weight loss, which can be investigated for tumor if necessary. Hypometabolism can lead to fatigue, immobility and depression, and serum thyroid function can be measured if necessary. The body fatigue is also seen in some elderly patients, the poor cardiopulmonary function leads to the lack of oxygen in the body after activities, people can appear tired symptoms, and in severe cases, it will be accompanied by wheezing and convulsions, for elderly patients to monitor cardiopulmonary function.