Hi i am Dr Ahmed Aly  
  thanks for using HealthcareMagic site ,
I had gone through your question and understand your concerns ..
    I personally do not think it is related with her 
indigestion , i hope she feels better soon , upper 
back pain could be due to a muscular 
sprain or spasm .
   She may use painkillers like 
advil ( NSAIDs ) tabs when needed , hot massages with topical anti-inflammatory gels , muscle relaxants , B12 vitamin supplements will be more than enough for her case .
     If pain persists i recommend she visit her physician for proper evaluation and management. 
Please click and consider a 5 star rating with some positive feedback if the information was helpful. Wish you good health,
Any further clarifications feel free to ask.