Hello. Based on the history you have given, I am assuming that you are having untimely eating habits and having a less nutritious food, which may have lead to gastritis or vitamin deficiency. So the main thing you should follow is a healthy diet.avoid taking spicy ,hot ,chilly food items , avoid smoking ,chewing beetle nuts , alcohol, take vitamin tablets ,apply local anesthetic gel to that area ,have tender coconut, buttermilk .have lot of fruits and vegetables. If you are not satisfied kindly consult a physician for further management.