Acid reflux is a fairly common condition that occurs when stomach acids and other stomach contents back up into the esophagus through the lower esophageal sphincter (les) the les is a muscular. Acid reflux back pain at night. Heartburn occurs as a result of food and acid leaking from the stomach up into the food pipe, or esophagus experiencing heartburn at night may mean that a person ate too soon before going to bed.
acid reflux back pain at night
