The correct answer is gastritis
Ulcers are being caused by bacteria which is known as Helicobacter pylori. It can be transmitted from one person to the other by exposure to vomit or fecal matter or by close contact.
The infection which is caused by the bacteria weakens the mucus which protects the duodenum and stomach then it allows acid to go through to the sensitive lining.
If it is not treated it can cause gastritis. The gastritis can occur either gradually or suddenly. It can also go ahead to the peptic ulcer disease and it can also come up with stomach cancer.
Some of the symptoms include nausea, burping, bloating, and vomiting.