The symptoms of extreme weakness are divided into symptoms of the body, respiratory system, digestive system and the nervous system, as follows: 1) the body will have anemia, emaciation and weakness; 2) the digestive system will have digestion, extreme malabsorption and subcutaneous fat atrophy, nausea, aversion to oil, acid reflux, heartburn, diarrhea and abdominal distension; 3) respiratory system symptoms, when a person is extremely weak Immune function will be extremely reduced, the most likely to obtain upper respiratory tract infections, such as pneumonia, tonsillitis, tracheitis, bronchitis, very easy to get and susceptible to high fever; 4, when the body is extremely weak neurological symptoms will be extreme fatigue, sleep extremely poor quality, not easy to sleep or think about sleep and other situations.