Do all alcers have helicopacter pylori?

Not all ulcers are caused by Helicobacter pylori (H. pylori) infection, but a significant number of peptic ulcers are associated with it. H. pylori is a bacterium that can lead to inflammation of the stomach lining and ulcer formation. Other factors, such as the use of nonsteroidal anti-inflammatory drugs (NSAIDs), excessive alcohol consumption, and stress, can also contribute to ulcer development. Therefore, while H. pylori is a common cause, it is not the sole factor in all cases of ulcers.