Drinking milk acid reflux may be the result of drinking too much milk or suffering from gastric or esophageal diseases themselves. 1. Drinking too much: Drinking too much milk in a short period of time will lead to a rise in intragastric pressure, coupled with the high fluidity of milk, so when you drink too much milk, acid reflux may occur, and secondly, due to the high content of Ca in the milk, Ca ions stimulate the gastric mucous membrane proton pump, gastric acid secretion increases, and acid reflux will also occur. 2. Gastroesophageal diseases: If you suffer from gastroesophageal reflux disease (GERD) or reflux esophagitis, you will experience acid reflux if you drink milk and increase the volume of the stomach, while stimulating the gastroesophageal mucosa. Drinking milk acid reflux may also be caused by other diseases, it is recommended that the patient go to the hospital as soon as possible to find out the cause of the disease, under the guidance of the doctor for treatment.