Onion root is effective in dispelling wind and dispersing cold, as well as detoxifying and dissipating blood stasis. It is used to treat cold headaches and frostbite, and is also useful for hemorrhoids and sores in the throat. Onion root belongs to a traditional Chinese medicine, belongs to the lily plant onion root, its flavor is pungent, nature flat, into the lung meridian. It has the effect of dispersing cold, removing blood stasis, detoxifying and dispelling wind. It is used to treat wind-cold headache, in addition to frostbite and sores in the throat. The adverse reactions and contraindications of Onion Root are not clear at the moment. Precautions should be taken to avoid spicy food during the use of Onion Root. If you need to use scallion root, you should use the medicine under the guidance of a traditional Chinese medicine practitioner, do not self-medicate, so as to avoid delaying the condition of the medicine is not the right evidence.