There may be several reasons for the stomach acid: 1, due to improper diet, like to eat spicy, greasy, stimulating food or drinking coffee, strong tea, etc., will stimulate the secretion of gastric acid, resulting in excessive secretion of gastric acid. 2, due to excessive mental stress, long-term anxiety, tension, will lead to dysfunction of the cerebral cortex, causing neurological disorders, secretion of large amounts of gastrin, promoting increased secretion of gastric acid. 3, long-term alcoholism and smoking, tobacco and alcohol can stimulate the gastrointestinal affect the blood circulation of the gastric mucosa, causing excessive secretion of gastric acid. 4, in addition to the above-mentioned causes, taking drugs can also lead to stomach acid, such as aspirin, etc. 5, has been stomach acid may also be due to gastritis, gastric ulcer and other stomach diseases, you need to go to the hospital to do timely stomach examination to determine the cause as soon as possible to treat.