The most common cause is the initial stage of viral cold, when the body is invaded by viral or bacterial infections will produce antigenic antibody immune complexes, rejection of the virus entering the body, at which time the body will show symptoms of weakness, aches and pains, weakness. 2, weakness, weakness of the body is the most common symptom and ionic disorders, usually due to periodic The most common symptoms of weakness are ionic disorders, usually due to periodic hypokalemia and hyponatremia, resulting in fever and weakness. 3, weakness and weakness are also seen in diseases of myocardial ischemia, often due to insufficient coronary artery blood supply, chest tightness, shortness of breath, weakness, and discomfort. 4, weakness and weakness are also common in cerebral artery blood supply and lack of oxygen to brain cells, when the body’s basal metabolic rate slows down, and weakness is accompanied by symptoms of dizziness and headache. 5, rare diseases such as hypothyroidism, anemia, tumors can also have the clinical symptoms of weakness and weakness.