Peptic ulcer is caused by long-term Helicobacter pylori infection and the consumption of stomach-irritating medications such as corticosteroids, aspirin, and long-term use of non-steroidal anti-inflammatory drugs, as well as irregular intake of spicy, stimulating, and cold foods, coupled with long-term emergency mental factors, leading to postprandial pain. The main symptoms are periodic rhythmic upper abdominal pain, which may be accompanied by nausea, vomiting, and acid reflux. Diagnosis can be made by performing a gastroscopy. Treatment mainly involves the eradication of Helicobacter pylori and protective stomach treatments among other symptomatic treatments. Complications may include upper gastrointestinal bleeding, perforation, pyloric obstruction, and malignant transformation. Dietary recommendations include avoiding smoking, alcohol, strong tea, coffee, indigestible foods, and some stimulating condiments.