Multifocal atrophic gastritis, or type B gastritis, is a type of chronic atrophic gastritis. Chronic gastritis is categorized into two types, one is chronic non-atrophic gastritis and the other is atrophic gastritis. Atrophic gastritis is further categorized into two types: type A gastritis, which is immune-related, and type B gastritis, which is mostly related to the infection of Helicobacter pylori. This type of gastritis is also known as multifocal atrophic gastritis because of the multifocal distribution of mucosal atrophy seen under gastroscopy. In multifocal atrophic gastritis, the gastric glands are damaged, their number decreases, the mucosa becomes thin, and there is a risk of cancer over time. A biopsy should be taken at gastroscopy to determine the degree of atrophy, intestinal metaplasia, and heterogeneous hyperplasia. It can be treated endoscopically if necessary. Suffering from gastritis should be taken seriously, and if there are symptoms such as abdominal pain, nausea, vomiting, vomiting blood, black stools, etc., then you should go to the gastroenterology department or general surgery department of the hospital as soon as possible to avoid delaying your condition.