Acid reflux in two-year-old babies can be caused by indigestion, gastroesophageal reflux, gastritis and so on. 1. Indigestion: If you eat cold food or indigestible food, it is easy to accumulate in the stomach and cause indigestion with acid reflux symptoms. 2. Gastroesophageal reflux: Gastroesophageal reflux may be caused by low function of anti-reflux barrier, reduced esophageal contouring ability, disruption of barrier function of esophageal mucosa, and low gastric emptying ability. 3. Gastritis: due to the exposure to various physical, chemical or biological harmful factors, causing inflammatory lesions of the gastric mucosa and gastric lining, acid reflux, accompanied by abdominal pain, nausea, vomiting, etc., can also occur. Two-year-old babies with acid reflux water, take your child to the hospital in time.