The onion poultice is a traditional folk remedy in which warmed onion slices are applied topically to the chest or affected area, commonly used to ease coughs, congestion, and minor aches. Research suggests that onions contain sulfur compounds and flavonoids, particularly quercetin, which demonstrate anti-inflammatory and mild analgesic properties in laboratory settings. Studies indicate that these compounds may help soothe irritated tissues and support the body's natural response to inflammation, which could partly explain why generations of home practitioners have turned to this simple preparation for respiratory comfort and localized pain relief. While clinical trials specifically on onion poultices remain limited, the biochemical profile of onions lends some scientific plausibility to this long-standing household practice.
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