Dyspepsia and Back Pain
Symptoms of back pain do not fit with most symptoms of dyspepsia, which come about from abdominal-related causes. Sometimes this condition will travel up the esophagus, in the case of heartburn, or result in intestinal pain and diarrhea.
However, just because back pain is not a common symptom does not mean you won’t experience it at the same time as your stomach ache. Here’s the thing about stomach pain: it can radiate, or seem to radiate, to other parts of the body.
This is especially true if you experience heartburn with your stomach ache. Symptoms like these don’t necessarily stay contained to their affected locations. Thus, experiencing pain that radiates to the back is not out of the question.
According to Merck Manual, the back pain you might experience during this condition is more likely a result of the heartburn or esophageal pain than the dyspepsia itself. So although back pain is not a direct symptom, it’s still one of the “splash effects," so to speak, of the condition, since it is the “cause of another effect," as it were.