Stomach acid is most commonly seen in chronic gastritis, gastric ulcer, gastroesophageal reflux disease, etc. It can usually be relieved by taking acid-suppressing drugs and gastric-promoting drugs, such as omeprazole and mosapride. Stomach acid is a relatively common symptom of the digestive tract, mainly caused by upper gastrointestinal tract diseases. Due to excessive secretion of gastric acid, it causes irritation to the gastric mucosa, thus causing the symptoms of stomach acidity. Acid-suppressing drugs, such as omeprazole, rabeprazole, lansoprazole, etc., can be taken orally under the guidance of a doctor to reduce the secretion of gastric acid and relieve the symptoms. In addition, stomach acid often needs to be combined with oral gastric stimulating drugs, such as mosapride and domperidone. It is recommended that patients with stomach acid should consult a doctor in a timely manner and choose the appropriate medication under the doctor’s guidance, and not use the medication arbitrarily on their own.