Rhubarb is a very commonly used laxative drug with bitter taste and cold nature, entering the spleen, stomach, large intestine, liver and pericardium meridians, with the effects of attacking stagnation, cooling the blood, activating blood circulation and removing blood stasis, as well as relieving bile and reducing yellow. It is often used clinically for stagnation in the stomach and intestines and dry stools, and can be used alone. If due to congestion of dampness and heat, heat accumulation and constipation, abdominal pain and fullness, irritability or delirium, it can be used together with Citrus aurantium and Hou Pu. In case of cold constipation, it is often used together with Gan Jiang and Radix et Rhizoma. For damp-heat diarrhea and dysentery, it can be used in combination with Huang Lian and Mu Xiang. Rhubarb is also used for bleeding due to hyperthermia, forced blood overflow or fire-heat inflammation, sore throat, swollen gums, and red eyes and mouth sores. It is often used in combination with drugs that activate blood stasis to treat postpartum abdominal pain and menstrual stasis, and can be used for bruises and painful bruises. Rhubarb is also used for damp-heat jaundice, often in combination with Yin Chen and Gardenia. Rhubarb is also used for intestinal canker, and can be used in combination with peony bark and peach kernel. In addition, rhubarb can be ground and mixed with oil, and can be used as a topical medicine for burns and fever sores.