There are many conditions and situations that contribute to acid reflux disease. One cause of acid reflux can be a hiatal hernia, which occurs when the upper part of the stomach moves above the diaphragm. Another cause can be pregnancy due to the change in a woman’s hormone levels and the growth of the fetus. Here are some great articles on Heartburn Causes
Heartburn Drugs May Contribute to the Problem
Heart Drug Combos Raise Risk of Gastrointestinal Bleeding