The major causes are ingestion of caustic poisons, alcohol, and certain medications like aspirin or steroids, physical stress from flu, major surgery, severe burns, or injuries, drug allergy or food poisoning. Herbs like Chamomile, english mallow, ginger (zingiber officinale), meadowsweet (leaves and flowers), amla (Indian goosbery), slippery elm and licorice (Glycyrrhiza glabra) are useful.
Amalaki choorna or Triphala choorna is given in a dose of three grams thrice a day for seven days. If there is constipation along with gastritis, then Avipattikara choorna is taken as the medicine of choice. The dosage is two teaspoonfuls at bedtime. Some other medicines are Dhaatri loha, Sukumara ghrita, Sootashekhara rasa, Kaamadudha rasa, Leela Vilas rasa, Chandrakala rasa and Amalapittantaka rasa.