H. pylori infection does not usually cause significant changes in the stool.
Helicobacter pylori infection can lead to gastritis, peptic ulcer and other diseases, its main manifestations of heartburn, acid reflux, stomach pain and bad breath and other symptoms, usually does not appear to lead to a change in stool properties of the symptoms, and most of the patients in the early stages of the infection is no obvious symptoms.
If there is a significant change in stool characteristics, such as a change in color. If the color of stool is red and bloody, consider whether it is lower gastrointestinal bleeding; if the color of stool is tarry black, consider whether it is upper gastrointestinal bleeding; if the color of stool is clay, consider whether it is liver and gallbladder diseases, etc. If the character of stool changes, such as granular, consider whether it is constipation; if it is fine stripes, consider whether it is intestinal pathology.
If the above symptoms occur, please go to the hospital for examination and treatment.