Thank for asking to HCM
I really appreciate your concern, this could be a gastritis
might be developed after the infection because of the medicine that she must have taken if I would be her doctor then I would treat her with the following treatment,
1) Tab Omeprazole
40 mg once in day for three weeks
3) Tab Domeperidone 30 mg once in day for three weeks
no need to worry she will be fine soon, hope this information helps you have nice day.