Prepared rhubarb refers to the Chinese herb rhubarb, which has the effects of diarrhea and attacking stagnation, 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 toxicity), removing blood stasis and opening up the meridians (eliminating stasis of blood and unblocking the meridians), and inducing dampness and eliminating yellowish coloration. It can be used in treating constipation due to solid heat, epistaxis (vomiting blood and nosebleed due to blood-heat), redness of the eyes and swelling of the throat, carbuncle furuncle (sores mostly occurring on the limbs or face, with a small shape and deep roots, as hard as nails), menstrual occlusion due to stasis of blood, stagnation of stasis in the post-partum period, bruises, damp-heat dysentery (dysentery due to damp-heat), jaundice with urinary redness and oedema etc., and is also used externally for treating burns. Rhubarb is bitter in taste and cold in nature, with strong power of diarrhea, clearing heat and fire, cooling the blood and detoxifying the toxin, it can be used for constipation caused by solid heat, epistaxis, eye redness and pharyngeal swelling, carbuncles and boils, carbuncle and abdominal pain, etc. Rhubarb can expel stasis and open up the menstruation and be used for menstrual occlusion of stagnant blood, post-partum stasis, bruises and so on, and it can also promote dampness and eliminate yellow, and it can be used for the treatment of jaundice. In addition, different concoctions of rhubarb have different focuses on efficacy, such as wine rhubarb can clear the upper blood (in the four periods of warm disease Wei Qi Ying Blood, belongs to the most in-depth stage or disease) heat and toxin, can be used for the eyes, throat and swollen, swollen and painful gums. Rhubarb Charcoal cools the Blood, removes stasis and stops bleeding, and can be used in bleeding disorders with Blood heat and stasis. It should be noted that rhubarb should be used with caution in pregnant women and during menstruation and lactation. The use of medication should be under the guidance of a doctor, do not take medication arbitrarily.