Hello, she should start eating small meals instead of three large ones whenever you can.  She must avoid foods that irritates her stomach, especially those that are spicy, acidic, fried or fatty.Let her take curd rice ,buttermilk before going to bed . She should not sleep soon after dinner. Stress may make gastritis symptoms worse. Stress may be hard to avoid, but she can learn to cope with it. If you have trouble relaxing, consider calming activities, such as meditation, yoga.