Gastritis Causes

Infection is the major cause in causing gastritis
Intake of unhygienic food
Eating extremely spicy and unfresh food stuff
Drinking of excess of tea and coffee
Smoking and usage if alcohol may also lead to gastritis
Use of certain medicines like antibiotics, aspirin etc.
Emotional stress and over burden of work mat also cause gastritis.

Irregular or excessive eating
The most frequent cause of gastritis is a dietetic indiscretion such as habitual overeating; eating of badly combined or improperly cooked foods; excessive intake of strong tea, coffee, or alcoholic drinks; or habitual use of large quantities of condiments and sauces.