The lack of strength and limpness may be due to the recent lack of rest, but also may be due to hypothyroidism, hypoglycemia, cachexia and other diseases. 1. Physiological factors: insomnia, low quality of sleep, recent mental stress and other factors can cause people to appear weak and flaccid symptoms, this is a normal phenomenon, generally adjust the work and rest will be better. 2. Pathological factors (1) hypothyroidism: hypothyroidism patients, due to the lower metabolism of the whole body, there will also be symptoms of weakness. (2) Hypoglycemia: Hypoglycemia may be caused by eating too little, or diabetic patients do not eat on time after using insulin, hypoglycemic patients will also have the symptoms of weakness and flaccidity, for this kind of patients, if they are still conscious, they should be fed with sugar water as soon as possible, and if they are unconscious, they should be given glucose by intravenous infusion to rescue them immediately. (3) Cachexia: Cachexia is a disease in which the body’s own tissues are consumed, often secondary to tumors, severe trauma and other consumptive diseases, and patients with cachexia may also have symptoms of weakness and limpness. In addition to the above reasons, other factors can also lead to the symptoms of weakness and limpness, and should be consulted in time to find out the cause, so as not to delay the condition.