Immunity is equivalent to the concept of “positive qi” in Chinese medicine. Astragalus can replenish qi and nourish blood, which has the effect of improving immunity, so Astragalus combined with other qi replenishing medicines has a certain effect on improving immunity. Astragalus can replenish qi and elevate yang (replenish qi so that yang qi can rise), consolidate the surface and stop sweating (stop sweating by consolidating the surface of the muscle), diuretic and eliminate edema (promote urination and eliminate edema), promote the production of fluid and nourish blood (replenish the body’s water and blood), promote stagnation and paralysis, support the detoxification and drainage of pus and poison (expel pus and poison from the body), converge sores and regenerate the muscle (help the sores to heal more quickly, and promote the growth of new flesh). Astragalus can be used for Qi deficiency and weakness, Qi subsidence (deficiency of spleen and stomach qi, appearing visceral organs falling and other manifestations), blood leakage (excessive menstrual flow or dripping), surface deficiency and spontaneous sweating (due to the weakness of the surface of the muscles and frequent sweating naturally), qi deficiency and oedema, blood deficiency and atrophy, hemiplegia (one side of the limbs can not be free to move), carbuncle and gangrene (a kind of venomous sores, occurring on the surface of the body, the limbs, the viscera in the acute suppurative diseases) is difficult to ulceration, the ulceration of the long time does not convergence. etc. Astragalus is used in combination with Radix Codonopsis, Rhizoma Atractylodis Macrocephalae, and Rhizoma Dioscoreae, which has the effect of tonifying the center and benefiting the qi (treating qi deficiency by replenishing the spleen), and it can be used for treating conditions such as weakness of the spleen and stomach, loose stools with scanty food (thin and unshaped feces), tiredness of the limbs, and loss of appetite. Patients are advised to use the medicine under the guidance of a doctor and should not take the medicine on their own to avoid delaying their condition.