Below is an instruction from Human. Write a response.
    ### Instruction:
    What to do for Gastritis ?
    ### Response:
    - Gastritis is a condition in which the stomach liningknown as the mucosais inflamed, or swollen.  - Common causes of gastritis include Helicobacter pylori (H. pylori) infection, damage to the stomach lining, and an autoimmune response.  - Some people who have gastritis have pain or discomfort in the upper part of the abdomen.
    