Rhubarb is used in the treatment of constipation due to stagnation of damp-heat, epistaxis (vomiting of blood and nosebleed due to blood-heat), eye redness and swelling of the throat, carbuncle furuncle (mostly occurring on the limbs or face, small in shape with a deep root base, as hard as nails), carbuncle of the intestine (carbuncle occurring in the intestines and viscera, manifested by fever, pain in the right side of the abdomen, and a palpable lump), abdominal pain and other disorders. Rhubarb, bitter taste, cold nature, to the spleen, stomach, large intestine, liver, pericardium meridian. Its main effects are diarrhea and attacking accumulation, clearing heat and fire (removing heat and fire from the body), cooling blood and removing toxins (referring to the treatment of blood-heat and toxins), expelling blood stasis and clearing channels (removing blood stasis and unblocking channels), and inducing dampness and eliminating yellow. It is used in treating blood stasis and menstrual closure, postpartum stasis, bruises, dysentery due to damp-heat evil, jaundice and urinary redness, gonorrhea, edema, etc. It is also used externally for treating burns. Wine rhubarb is good at clearing heat and toxins in the upper blood (in the four periods of warm disease, the most in-depth stage or disease), used for red eyes and swollen pharynx, swollen gums and pain. Ripe rhubarb is used to expel fire and detoxify the body (to get rid of the fire and poison in the body), and is used for sores and ulcers caused by fire and poison. Rhubarb charcoal cools the blood, removes blood stasis and stops bleeding, used for blood-heat with blood stasis. Note that this drug is bitter and cold, and should not be used by people with weak stomachs; rhubarb is sedative in nature and is good at promoting blood circulation and removing blood stasis, so it should not be used during menstruation, lactation and pregnancy. The power of rhubarb is strong, and it should not be used arbitrarily in non-substantial cases. Rhubarb is an attacking medicine with strong diaphoretic power, so it should not be taken for a long time, and should be used under the guidance of a professional Chinese medicine practitioner.