Gastritis is inflammation of the stomach lining and can be an acute or chronic disorder. The two major causes of gastritis are 1) Helicobacter pylori and 2) non-steroidal anti-inflammatory drugs (NSAIDs). However, there are many other causes such as autoimmune problems, diseases like Crohn's disease, sarcoidosis, and isolated granulomatosis gastritis.

Although some individuals with gastritis may show no symptoms, both acute and chronic conditions may have symptoms such as abdominal pain, nausea, vomiting, and occasionally, belching, bloating, loss of appetite and indigestion.

Gastritis can be diagnosed by the patient's symptoms and history, in addition to tests of blood, stool, immunological, and biopsy to detect H. pylori. Your doctor may recommend other tests on an individual basis.