There is more than one cause of generalized weakness, the more common ones are after strenuous exercise such as climbing, running, playing ball, etc., the body metabolizes a lot of lactic acid, which can lead to generalized weakness; usually it can be relieved with good rest; when the body temperature is high from a viral cold, in addition to spleen and stomach dysfunction or tumour may also have the symptom, it is recommended to go to the hospital for examination.