She might be having pain radiating to back due to Gastritis.
Next Steps
Take PPI and Antacid for 7 days. With proper spacing between meals, small frequent meals, atleast 2 h of gap between last meal of the day and time of sleep.
If the Symptoms are not subsiding evaluation by a surgeon, UGI ENDOSCOPY, USG Abdomen
Health Tips
Avoid spicy foods.
Avoid junk food.
Adequate hydration.
Chew adequately and swallow.
Avoid coffee/tea on an empty stomach.