Peptic Ulcer Disease

Peptic ulcer disease (PUD) is a condition characterized by the development of open sores or ulcers in the lining of the stomach, duodenum, or lower esophagus, primarily caused by *Helicobacter pylori* infection or long-term use of non-steroidal anti-inflammatory drugs (NSAIDs). It may also result from stress-related conditions such as severe illness, burns, surgery, or central nervous system trauma. Common symptoms include upper abdominal pain (often burning or gnawing, sometimes relieved by eating), nausea, vomiting, bloating, belching, weight loss, and fatigue. Complications can involve bleeding, perforation, or gastric outlet obstruction. Diagnosis is typically confirmed through endoscopy (esophagogastroduodenoscopy), along with testing for *H. pylori* via blood, breath, or stool samples. Treatment involves antibiotics to eradicate *H. pylori*, acid-reducing medications such as proton pump inhibitors or H2 blockers, and lifestyle modifications including stress management and dietary changes. In refractory cases, surgical intervention may be required. Associated genes include *S100A8*, and pathways involved include signal transduction and gastrin signaling. Drugs like metronidazole and naproxen are linked to the disorder, with affected tissues including the small intestine and liver.