Feeling clogged stomach is mostly caused by chronic gastritis, peptic ulcer and other diseases. 1. Chronic gastritis, caused by a variety of causes of chronic inflammatory changes in the gastric mucosa, mostly caused by Helicobacter pylori, due to long-term inflammation of the stomach, affecting the digestive function, there will be a decrease in appetite, stomach discomfort and other symptoms, which is also known as gastric congestion. 2. Peptic ulcer, mostly due to long-term bad habits, such as irregular diet, regular overeating, staying up late, etc., which can cause ulcerative lesions in the stomach and duodenum, in addition to the symptoms of gastric congestion, there will also be epigastric postprandial pain or hunger pain and other symptoms. In addition to the above diseases, it can also be seen in reflux esophagitis, gastric cancer, etc. It is recommended that the patient consult a regular hospital in a timely manner to further improve the gastroscopy, breath test and other tests to determine the cause of the disease, and under the guidance of a professional physician to carry out targeted treatment.