People who have gastritis can eat onions, but it is recommended to eat fried onions, not cold onions. Onions are pungent and irritating foods, and eating them cold is irritating to the gastrointestinal mucosa, which can aggravate the symptoms of abdominal pain, bloating and indigestion in patients with gastritis and is not conducive to recovery. The onion has a role in Chinese medicine to regulate gas and stomach, dispersing wind and cold, and in Western medicine to sterilize and protect the cardiovascular system, which is an essential part of the family diet. Meanwhile, onions are rich in calcium, potassium, selenium and other trace elements, which are more suitable for patients with high blood sugar, high blood pressure, hypertension, tumors and indigestion. Patients with chronic gastritis should eat three regular meals and give light, easy-to-digest, vitamin-rich food.