Astragalus in boiled water has the effects of tonifying qi and consolidating the surface (consolidating the surface of the muscle by tonifying qi), diuretic and draining pus, and astringing sores and promoting the growth of muscle (helping sores to heal faster and promoting the growth of new flesh). However, astragalus in water has a limited amount of active ingredients, so it is recommended to take it by decoction. Astragalus is sweet in taste and warm in nature; it belongs to the spleen and kidney meridians, and has the effects of strengthening the spleen and tonifying the middle, elevating yang and lifting up the sun (lifting up yang qi of the body to lift up the sunken organs), benefiting the guards and consolidating the surface, inducing diuresis, and restraining toxins to produce muscles (discharging toxins to promote the growth of muscles and healing of wounds). It can be used for treating spleen qi deficiency, lung qi deficiency, qi deficiency with spontaneous sweating, qi and blood deficiency, sores and ulcers that are difficult to ulcerate and rot, or ulcers that are difficult to converge for a long period of time. It is not suitable for those who have a solid surface and a prevalence of evil, sores and ulcers at the beginning of ulceration, or those who have a prevalence of heat and toxin after ulceration. It is recommended to take astragalus under the guidance of a doctor to avoid misunderstanding or adverse reactions.