Doctors told me gastritis can't cause flank area pain or back pain. And now I'm stressing : r Gastritis Gastritis Definition: Inflammation of the gastric mucosa, which may be acute or chronic, commonly due to infection, drugs, or autoimmune causes. Symptoms: * Epigastric pain (burning gnawing) * Nausea, vomiting * Bloating, early Gastritis referes to inflammation of the gut lining. Symptoms might include pain, a burning sensation in the stomach, loss of appetite, nausea, indigestion, hiccups, vomiting, etc. A 2022 cohort study found that Gastritis Beacon Health System