After a cold and fever, the body may be weak with the body of positive and evil struggle, loss of positive qi caused by qi deficiency or yin deficiency can be through the sheng pulse san, yu ping feng san, plus or minus Weiwei lei soup, etc. to alleviate. 1. Qi deficiency: Sheng Wei San has the effect of benefiting qi and generating fluid (promoting fluid production by replenishing qi), astringing yin and stopping sweating (astringing yin fluid and reducing sweating), and has a certain effect on sweating, fatigue (mental exhaustion and physical weakness), body fatigue, dry throat and thirst; Yupingfeng San has the effect of benefiting qi and consolidating the epidermis to stop sweating (stopping sweating by consolidating the muscle epidermis), and it has certain effect on sweating due to epidermal deficiency (weak muscle epidermis leading to abnormal sweating), shortness of breath and fatigue, but it should be used with caution for those who are allergic to the above medicines and those who are in solid condition. 2. Yin deficiency: Weiwei Tang has the effect of nourishing yin and relieving the surface, which is useful for symptoms of yin deficiency after a cold, such as fever, slight malignant cold (fear of cold), dry cough with little phlegm, dry mouth and pharynx, heartburn, red tongue, and fine pulse, but it should not be used by those who are allergic to the medicine or those with yang deficiency. The above drugs have some effect on the deficiency of qi or yin caused by the damage to the body’s positive qi after a cold and fever, do not use the drugs on your own in the clinic, please go to the regular hospital in a timely manner, so as to avoid delays in the condition.