Comfrey Oil is a topical proprietary Chinese medicine, it is a liquid preparation, the most important ingredient of Comfrey Oil is Comfrey. Comfrey has the effect of treating blood-heat toxicity, spot rash, measles, sores, eczema, water and fire burns and other conditions. Comfrey, sweet, salty and cold in nature, belongs to the heart and liver meridians. It has the effects of clearing heat and cooling the blood (relieving blood heat by clearing heat), activating blood circulation and detoxifying the toxin, penetrating rashes and eliminating spots, and is mainly used for treating the body’s conditions such as blood-heat and toxicity, spot rashes, measles, sores, eczema, and water-fire burns. Externally boiled ointment or oil coating, comfrey oil can be used externally for skin diseases such as eczema, burns and other diseases. Comfrey adverse reactions are not clear. Comfrey is cold and slippery in nature, and has a light diarrhea effect, so it is contraindicated for people with weak spleen and stomach and loose stools (unformed stools, stools like loose mud), and pregnant women are advised to use it with caution. The herb should be used under the guidance of a professional physician to avoid self-medication.