Is it true that onion root water cures cough?

Onion root is generally referred to as the Chinese herb onion beard. Simple infusions of Chinese herbs have limited efficacy and are usually not therapeutic. The main treatment of onion whiskers also does not have cough this item, there is no authoritative basis can state that onion whiskers water for cough effective.
The onion is the root of the onion plant in the genus Allium, family Liliaceae. Scallion has the effect of dispelling wind and dispersing cold (dispelling wind evil and dispersing cold), and promoting the circulation of qi and dispersing blood stasis.
Onion whiskers are used as a primary treatment for wind-cold headaches and throat sores; the primary treatment does not include coughs, and it is difficult to use a single herb for this purpose.
In addition to the direct treatment of the lungs, the treatment of coughs in Chinese medicine should also be based on a holistic approach, paying attention to the treatment of the spleen, liver and kidneys, etc. When treating external coughs, it is usually based on the situation. When treating external coughs, it is generally beneficial for the lungs to spread the cough; when treating internal coughs, it is important to prevent the lungs from spreading the cough too much and damaging the positive qi, and to focus on regulating the positive qi.
The treatment of cough should follow the guidance of the Chinese medicine practitioner, unauthorized use of medication may have serious consequences.