Can patients with rhinitis eat onions?

Nasal inflammation patients can generally consume onions in moderation, but should avoid them if allergic to onions or during severe nasal inflammation flare-ups. If in doubt, it is recommended to consult a healthcare professional in advance. Detailed explanations are as follows:

Onions are rich in vitamin C, quercetin, and other components. When consumed cooked, they can provide essential nutrients for the body. Quercetin has certain anti-inflammatory properties, and moderate consumption may help maintain immune balance and potentially alleviate nasal inflammation symptoms to some extent. Additionally, thoroughly cooked onions are less irritating, and generally will not cause significant irritation to nasal mucosa if consumed in moderation.

If nasal inflammation patients are allergic to onions, consuming them can trigger abnormal immune responses, releasing substances such as histamine, which may worsen symptoms such as nasal itching, sneezing, and runny nose. During acute nasal inflammation episodes, the nasal mucosa is highly sensitive and congested; the pungent odor and irritating components in onions may easily irritate the nasal passages, worsening nasal congestion and runny nose symptoms.

Prior to consuming onions, nasal inflammation patients should ensure they have no allergy history, choose thoroughly cooked onions, and control the portion size per serving. If nasal symptoms worsen or other abnormal reactions occur after consumption, they should stop immediately and seek medical attention.