Diarrhea after eating garlic may be related to the irritation of garlic, or the intestine may be allergic to garlic, while gastrointestinal inflammation and irritable bowel syndrome are not excluded. 1. Gastrointestinal tract stimulation: Raw garlic has strong irritation, and eating too much will stimulate the gastrointestinal mucosa and irritate the intestine, thus causing symptoms of abdominal pain and diarrhea. Patients can drink more water and take appropriate gastrointestinal mucosal protective agents, such as montelukast, magnesium aluminum carbonate, etc.; 2. Allergic reaction: Patients may be allergic to garlic, causing allergic gastroenteritis, manifesting as abdominal distension, abdominal pain, diarrhea and other symptoms, which can be relieved by anti-allergic treatment, and garlic should be avoided in the future; 3. Irritable bowel syndrome: Patients with irritable bowel syndrome have high sensitivity of intestinal mucosa, and eating Because the course of irritable bowel syndrome is long and easy to recur, patients with irritable bowel syndrome can be treated through symptomatic treatment and Chinese medicine. aggravate the inflammation of gastrointestinal mucosa and easily trigger diarrhea. Therefore, drugs to eradicate H. pylori or improve the inflammation of the gastric mucosa should be taken according to medical advice for etiological treatment, while reducing the intake of such irritating foods as garlic to avoid the reappearance of the above symptoms. Therefore, if diarrhea occurs after eating garlic, patients are advised to avoid eating it in the future. Patients with severe diarrhea need to go to the gastroenterology department of a hospital in time to get a clear diagnosis and take targeted treatment according to the cause.