Could stress be the cause of reflux, even when factors like posture or foods make the symptoms appear or worsen?

Multifactorial: Acid reflux disease is often multifactorial, and stress is certainly a factor involved in the process. Diet and the avoidance of trigger foods is paramount as well as trying to decrease stress. There are many over the counter acid reflux medications you can try as well, but as stated the diet and stress reduction is the key. If severe or worsens, see a GI dr. For eval. Best wishes.