The most typical cause of ulcers is a bacterial infection.
A Helicobacter pylori bacterial infection frequently results in ulcers (H. pylori). Although it is unclear how it spreads, this bacteria is highly widespread. In the US, H. pylori infections affect close to 40% of the population. H. pylori generally doesn't cause any issues for people. Antibiotics can be useful in eradicating H. pylori when it does result in an ulcer.