Can patients with stomach pain eat onions in moderation?
Generally speaking, patients with stomach pain can consume onions in moderation. The detailed analysis is as follows:

Onions are rich in various nutrients including vitamin C, folic acid, potassium, zinc, selenium, and dietary fiber. They offer benefits such as protecting the cardiovascular and cerebrovascular systems, enhancing beauty and complexion, and possessing certain antibacterial properties—all of which are beneficial to the human body. If a patient's stomach pain is mild and there are no accompanying symptoms such as nausea or vomiting, onions can usually be consumed in moderate amounts. In such cases, the nutrients in onions may aid in the body's recovery.
If a patient's stomach pain is severe and accompanied by other discomforts such as nausea, bloating, or diarrhea, it is generally advised to avoid eating onions. This is because onions are irritating and may exacerbate stomach pain symptoms. Certain compounds in onions may be released during cutting or cooking, potentially causing additional irritation to the gastrointestinal tract. This irritation is particularly noticeable in individuals with sensitive gastrointestinal systems and may lead to issues such as bloating or diarrhea.
For patients with stomach pain who are able to eat onions, it is recommended to consume them in moderation and avoid excessive intake at one time. Additionally, it is advised to eat cooked onions to reduce their irritant potential.