When a person is infected with HP, he or she will only show symptoms of the disease if it causes related diseases. Common manifestations are as follows: 1. acid reflux. HP induces excessive secretion of gastrin, resulting in excessive acidity in the stomach, which is manifested as acid reflux and heartburn. 2. Abdominal pain. Due to damage to the mucosa of the stomach and duodenum, recurrent episodes of severe abdominal pain and small amount of bleeding in the upper gastrointestinal tract can occur. 3, bad breath. HP survives in plaque and infection occurs in the mouth, which may lead to heavy breath, and in severe cases, there is often a special oral odor that cannot be removed by cleaning. 4.Indigestion, upper abdominal distension. Fullness, discomfort or pain in the upper abdomen after eating, often accompanied by other adverse symptoms, such as belching, bloating, acid reflux and loss of appetite. 5.Dermatological disease recurring, no clear cause can be found.