Stomach fever and heartburn are mainly manifested by a burning sensation in the stomach or the back of the sternum, extending upward from the lower part of the sternum. There are many reasons for this symptom, such as the usual habit of overeating and liking to eat stimulating food, which causes relaxation of the lower esophageal sphincter or excessive secretion of gastric acid. The symptom can also occur due to mental factors, such as introversion, depression, anxiety, insomnia, or chronic mental tension. Of course many stomach diseases, such as peptic ulcer, chronic gastritis, gastroesophageal reflux disease, gallbladder disease, etc. have similar symptoms. Therefore, in addition to the usual changes in dietary habits, severe cases can be treated with antacid medication under the guidance of a physician.