Usually, rhubarb and astragalus can be brewed together and drunk. However, the active ingredient of infused water is limited, and the decoction method is recommended. Rhubarb has the effects of diarrhea and attacking accumulation, clearing heat and fire (removing heat and fire from the body), cooling the blood and detoxifying the toxin (referring to the treatment of blood-heat and toxin accumulation), expelling blood stasis and opening up the meridians (removing blood stasis and unblocking the meridians), and inducing dampness and eliminating yellowish coloration. Astragalus has the effects of tonifying qi and elevating yang (tonifying qi to elevate yang qi), consolidating the surface to stop sweating (stopping sweating by consolidating the surface of the muscle), inducing diuresis to reduce swelling (relieving urination and eliminating oedema), generating fluids to nourish blood (replenishing the body’s fluids and blood), promoting stagnation to relieve paralysis, supporting toxins to drain pus and poison, and restraining sores and muscles (helping sores to heal more quickly, and promoting the growth of new flesh). Rheum palmatum belongs to the class of herbs that can remove heat and evil spirits, and astragalus belongs to the class of herbs that can replenish qi. Taken together, the two herbs have the effect of supporting the positive and dispelling evil spirits (supporting the positive spirits and dispelling evil spirits in the body), and draining turbidity and removing toxins. The therapeutic effect of the two flavors of Chinese medicine in water is limited, it is recommended that the patient should be under the guidance of a professional physician to take medication, do not take and overdose, so as not to produce adverse effects.