Long-term hyperacidity is not a common early manifestation of gastric cancer, and there are many kinds of causes that can lead to it, which need to be diagnosed clearly and then take corresponding treatment measures and methods. Long-term hyperacidity is mostly considered to be caused by gastroesophageal reflux (cough, retrosternal pain, etc.), peptic ulcer (periodic and rhythmic epigastric pain with heartburn, acid reflux, etc.), chronic gastritis (belching, epigastric pain, acid reflux, heartburn, etc.), etc. In the early stage of gastric cancer, most of them have no clinical symptoms, and a few of them only show upper abdominal pain. In early stage, most stomach cancers have no clinical symptoms, and a few of them only show epigastric discomfort, loss of appetite, etc. As the disease progresses, it can lead to symptoms of acid reflux, vomiting blood, blood in stool, emaciation and anemia. Diagnosis of gastric cancer must rely on electronic gastroscopy, cytology, pathology and other related tests to make a diagnosis, and the disease cannot be confirmed only by the clinical manifestation of prolonged gastric acid. If you have long-term stomach acidity, you need to go to the hospital for relevant examinations to make a clear diagnosis, and you should not use medicines indiscriminately.