The causes of stomach pain are divided into the following categories: 1, H. pylori infection, H. pylori infection can cause gastritis, gastric ulcer, and even gastric lymphoma and other diseases, H. pylori infection can also cause stomach pain, which is a major cause. 2, taking some drugs that irritate the gastric mucosa, such as non-steroidal anti-inflammatory drugs, which is a large category, which includes aspirin, Intacrine and other commonly used drugs. 3, diet Inappropriate, such as the consumption of spicy and stimulating, too acidic, too sweet, cold, greasy food, such as ice cream, fried food, burgers, and more spicy food, raw garlic, chili, etc., can cause stomach pain. These are a few of the main causes of stomach pain.