Frequent mouth ulcers are not directly related to H. pylori infection. Helicobacter pylori is a spiral-shaped, slightly anaerobic, very demanding bacteria for growth conditions. Helicobacter pylori infection can cause gastrointestinal diseases, such as chronic gastritis, gastric ulcers, dyspepsia and gastric cancer. Mouth ulcers are mostly considered to be caused by trauma, vitamin deficiencies and other factors, such as prolonged, recurrent mouth ulcers, may be caused by immune system diseases, the more common are systemic lupus erythematosus, vasculitis, leukoaraiosis and so on. There is no direct relationship between the two, the presence of mouth ulcers, Helicobacter pylori, it is recommended that under the guidance of a doctor to actively treat, to avoid delays in the condition.