Can placing onion on the chest cure cough and bronchitis?
Topical application of onions lacks clinical support for respiratory relief. Though rich in quercetin and sulphur, onion compounds benefit health only when consumed. External use has no proven efficacy against bronchitis or cough. Placing onions on your chest doesn’t treat coughs. Instead, rest, fluids, and proper meds work best. Eat onions for nutrition—but don’t rely on them as a cure.