Can people with stomach problems eat onions?

Whether individuals with stomach conditions can consume onions depends on the type of stomach ailment and the stage of the illness. When the condition is stable and digestion is good, small amounts of well-cooked onions may be consumed. However, during active phases of illness or when the gastrointestinal tract is sensitive and fragile, eating onions is not recommended. If in doubt, it is advisable to consult a doctor in advance. Detailed analysis is as follows:

If the stomach condition is in remission—for example, chronic gastritis not in acute flare-up phase or after healing of gastric ulcers—and there are no daily symptoms such as stomach pain or acid reflux, onions may be consumed in small quantities after being thoroughly cooked until soft. Cooked onions are less irritating and contain sulfides and dietary fiber; moderate intake can help stimulate secretion of digestive fluids and enhance gastrointestinal motility.

If the stomach condition is in an acute phase—for example, during an active gastric ulcer or gastritis flare-up—the pungent and irritating substances in onions may stimulate the gastric mucosa, leading to excessive gastric acid secretion, which can worsen symptoms such as stomach pain, heartburn, and bloating. It may even lead to bleeding from the ulcer or exacerbation of inflammation. For patients with inherently weak gastrointestinal function and poor digestion, the coarse fiber in onions is difficult to digest and may easily cause indigestion, abdominal distension, and other issues. In such cases, onions should be strictly avoided.

Individuals with stomach ailments should confirm that their condition is stable before consuming onions. They should be cooked using gentle methods such as stewing or boiling, and frying, cold mixing, or adding spicy seasonings should be avoided. If any stomach discomfort occurs after consumption, stop eating onions immediately and seek medical attention.