Patients with heartburn after eating green onions are considered to have damage to the gastric mucosa caused by a large secretion of gastric acid. For the above situation, we should immediately prohibit eating raw onion, and give warm water, noodle soup, rice porridge, milk, etc. to dilute gastric acid and protect gastric mucosa, and eat more rice porridge, millet porridge, yam porridge, mung bean porridge, pumpkin porridge, etc. If the symptoms are obviously aggravated, we can give gastric mucosa protective drugs, acid suppressants, and gastric motivational drugs and other comprehensive treatment. Gastric mucosal protective drugs commonly used magnesium aluminum carbonate, aluminum thioglycollate, colloidal bismuth, acid suppressants can be given omeprazole, lansoprazole, rabeprazole, pantoprazole sodium, esomeprazole. If the stomach acid is serious, also give to promote gastric motility drugs, such as mosapride citrate, domperidone, etopride hydrochloride, etc. In daily life, raw, cold, hard, spicy and irritating foods such as raw onion, ginger, garlic, chili and pepper should be avoided, and warm, soft, light and easily digestible foods should be given with few and frequent meals to promote the repair of gastrointestinal mucosa.