Helicobacter pylori (H. pylori): A bacteria that lives in the mucous lining of the stomach; without treatment, the infection can lead to ulcers, and in some people, stomach cancer. Bile reflux: A backflow of bile into the stomach from the bile tract (that connects to the liver and gallbladder)

Infections caused by bacteria and viruses

Symptoms of Gastritis

• Nausea or recurrent upset stomach
• Abdominal bloating
• Abdominal pain
• Vomiting
• Indigestion
• Burning or gnawing feeling in the stomach between meals or at night
• Hiccups
• Loss of appetite
• Vomiting blood or coffee ground-like material
• Black, tarry stools