Children infected with Helicobacter pylori typically show no symptoms initially, but may later develop chronic gastritis and gastrointestinal ulcers. Clinical manifestations mainly include vomiting, nausea, abdominal distension, acid reflux, and abdominal pain, and may even present symptoms such as bloody stools or vomiting blood. If a child is infected with Helicobacter pylori but exhibits mild symptoms, treatment can focus solely on the infection. However, if there are gastrointestinal ulcers or repeated gastrointestinal discomfort, treatment should include antibiotics along with medications that suppress stomach acid production. Treatment duration usually lasts about one to two months, depending on the specific condition of the child.