Soak water selection of raw astragalus or roasted astragalus can not make full use of the active ingredients of the drug, it is best to take after decoction, roasted astragalus qi tonic, raw with solid surface sores. Astragalus is sweet in flavor, slightly warm in nature, and belongs to the lung and spleen meridians. The effects of astragalus are to replenish qi and elevate yang (tonifying qi so that yang qi can rise), consolidate the surface to stop sweating (stopping sweating by consolidating the surface of the muscle), diuretic to reduce swelling (relieving urination and eliminating oedema), diuretic to relieve stagnation and paralysis, to support the drainage of toxins and pus (draining pus and toxins from the body), and to astringent to promote the development of muscles (helping to heal sores more quickly and promoting the growth of new flesh). Astragalus can be used to treat deficiency and fatigue, loose stools (thin and unformed feces), Qi subsidence (deficiency of spleen and stomach qi, which results in the fall of internal organs), prolonged diarrhea and prolapse of the anus, blood in the stools and leakage of blood (excessive menstruation or dripping), sweating from the surface (due to the weakness of the surface of the body and the frequency of spontaneous sweating), and qi deficiency and edema. Astragalus can also be used to treat internal heat and thirst (internal heat accompanied by symptoms such as eating, drinking and urinating), blood deficiency, hemiplegia, paralysis and numbness, carbuncle and gangrene (a kind of venomous sores, acute suppurative diseases occurring on the surface of the body, limbs, and internal organs), which are difficult to ulcerate, and do not converge for a long period of time. Astragalus stir-fried with honey is used to benefit qi and tonify the middle, while raw is used to solidify the surface and support sores. The adverse effects of astragalus are not clear, and it should not be taken by those who have solid surface evils, sores and carbuncles at the beginning of ulceration, or those whose heat is still toxic after ulceration. Chinese medicine in water, its active ingredients precipitation is limited, can not replace the therapeutic effect of the drug. If you need to use astragalus, you need to use it correctly under the doctor’s diagnosis, not blindly self-use, so as not to cause adverse effects on the body.