The body is always weak, divided into the following cases: 1, physical weakness, such as lung Qi deficiency will be manifested as weakness, accompanied by shortness of breath or even wheezing, more obvious after the activity. 2, spleen and stomach deficiency, Chinese medicine believes that the spleen is the main limbs, is the source of Qi and blood biochemical, when the spleen and stomach function declined, can not transport water and grain essence moisten the limbs, will cause muscle atrophy of the limbs, will also cause limb weakness. 3, liver blood deficiency, liver blood deficiency, when the liver blood deficiency, the tendons lose liver blood moisten, will also cause the tendons weak. The Chinese medicine believes that the liver is the main tendon, when the liver blood is insufficient, the tendons lose the liver blood moistening, will also cause the tendons weakness, will be easy to fatigue, always have no strength. 4, kidney essence deficiency, the kidney is the main bone marrow, when the kidney essence deficiency, the body’s bone growth will appear abnormal, this time will also appear bone soft, weak, but these conditions are generally chronic process. 5, phlegm drink caused by the flow of Qi and blood is not smooth, Yang Qi The Yang energy cannot reach outside. Chinese medicine believes that dampness is sticky and heavy, it can impede the flow of qi and blood, impede the outward flow of yang qi, when yang qi can not be reached, the limbs can not be moistened by qi and blood, there will always be a feeling of lack of strength, but this lack of strength is not a deficiency, but due to phlegm and drinks, treatment should be applied to resolve phlegm and dispel drinks.