What causes stomach ulcers? Natural remedies for stomach ulcers. Would you believe that the most common causes of peptic ulcers are an infection with the bacterium Helicobacter pylori (H. pylori).  Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) also known as ibuprofen (Advil, Motrin IB, others) and naproxen sodium (Aleve) can also cause ulcers. Contrary to […]