Patients with stomach pain after eating garlic can drink more water or milk. Eating garlic stomach pain is because garlic contains allicin, which is a very stimulating ingredient that is alkaline. When eating garlic, the neutralization reaction of stomach acid will backfire, and the feeling of heartburn will arise, forming a stimulus to the gastrointestinal mucosa leading to spasm of the gastrointestinal mucosa. When the patient has chronic gastric disease, or previously healthy, but eat more garlic, then there will be stomach pain, it is recommended to usually avoid onion, ginger, garlic, pepper, chili and other stimulating food intake. Appear to eat garlic stomach pain to drink more water, dilute the concentration of gastrointestinal allicin, while drinking more milk, milk can protect the gastrointestinal mucosa, but also can break down the allicin. If there is heartburn, you can also drink milk to relieve spicy. If the pain persists without relief, you can take oral medications such as magnesium aluminum carbonate, aluminum thiosulfate, bismuth pectin, and proton pump inhibitors to inhibit the secretion of gastric acid and protect the gastric mucous membrane, and to promote the relief of symptoms.