Helicobacter pylori mainly parasitizes the mucous membrane near the gastric sinus and pylorus of the stomach, etc. Patients infected with H. pylori may experience abnormal symptoms such as bad taste in the mouth, easy hunger and indigestion. Pregnant and breastfeeding women, patients with significant abnormalities in liver and kidney function, and other groups of people may not be able to eradicate H. pylori in the short term. 1. Pregnant women and nursing mothers: the eradication of H. pylori requires the use of a large number of drugs for treatment and a longer period of time, the drugs may affect the fetus or newborn, pregnant women and nursing mothers are recommended to wait until the end of lactation and then follow the doctor’s advice for the treatment of the disease. 2. Patients with abnormal liver and kidney function: Because the drugs used to eradicate H. pylori can damage liver and kidney function, patients with abnormal liver and kidney function may not be able to carry out complete eradication. Patients with H. pylori infection are advised to seek medical attention as soon as possible and under the guidance of a doctor. Helicobacter pylori is very harmful to human body and needs to be treated according to the principle of early detection and early treatment. Drugs need to be used under the guidance of a professional physician, and should not be used arbitrarily.