Acid reflux in the morning may be caused by reflux esophagitis, female pregnancy, chronic gastritis, peptic ulcer and other reasons. 1. Reflux esophagitis: the position of esophagus is relatively low when sleeping at night, gastric acid can easily reflux into the esophagus and stimulate the esophageal mucosa, and the inflammation of the esophagus is more serious when waking up in the morning, which causes gastric acid reflux. 2. Female pregnancy: after pregnancy, due to the increase in hormone levels in the body, resulting in acid reflux, especially in the morning when waking up. 3. Chronic gastritis: the gastric mucosa is congested and inflamed for a long time, and the secretion of gastric acid increases, so when you wake up in the morning, acid reflux is accompanied by nausea, bloating and other symptoms. 4. Peptic ulcer: gastric mucosa ulcer surface, gastric acid secretion is more, affecting the digestion of food food retention in the stomach, the morning get up easily cause acid reflux, heartburn, nausea, vomiting and other symptoms. Morning acid reflux, it is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for treatment.