Indigestion is a common term for discomfort or pain felt in the upper abdomen after eating. In clinical language, it often overlaps with dyspepsia, a symptom-based diagnosis rather than a single disease. People use Indigestion to describe fullness, burning, nausea, belching, or “stomach upset.” Clinicians use the term as a starting point for evaluating upper gastrointestinal (GI) symptoms.

Vomiting is the forceful expulsion of stomach contents through the mouth. It is a symptom and a protective reflex that can occur in many illnesses. It is commonly discussed in emergency medicine, gastroenterology, surgery, oncology, and primary care. Clinicians use the pattern and associated features of Vomiting to guide diagnosis and testing.

Nausea is the unpleasant sensation of needing to vomit. It is a symptom, not a diagnosis, and it can occur with or without vomiting. In gastroenterology, it is commonly used as a clinical clue to digestive, hepatobiliary, pancreatic, medication-related, or systemic illness. In everyday language, people use it to describe “feeling sick to the stomach.”

Hematochezia means the passage of red or maroon blood from the rectum. It is commonly described as “bright red blood per rectum” in clinical notes. Hematochezia is a symptom term, not a diagnosis. It is used most often in gastroenterology, emergency care, and general surgery to frame gastrointestinal (GI) bleeding evaluation.

Melena is black, tarry, foul-smelling stool caused by digested blood in the gastrointestinal (GI) tract. It is most commonly discussed as a sign of GI bleeding, especially from the upper GI tract. Clinicians use the term Melena in emergency care, inpatient medicine, and gastroenterology consults. It is a symptom and a clinical description, not a diagnosis by itself.

Hematemesis means vomiting blood. In plain terms, it describes blood coming up from the upper digestive tract during vomiting or retching. The term is commonly used in emergency medicine, gastroenterology, hepatology, and GI surgery documentation. It is a symptom description, not a final diagnosis.

Upper GI Bleed means bleeding that originates in the upper gastrointestinal tract. It usually refers to bleeding from the esophagus, stomach, or duodenum. Clinicians use the term to describe a common emergency that can range from mild to life-threatening. It is often discussed in emergency, inpatient, endoscopy, and surgical settings.

A Duodenal Ulcer is a break in the lining of the duodenum, the first part of the small intestine. It is a common form of peptic ulcer disease, meaning an ulcer caused by acid-peptic injury. Clinicians use the term in gastroenterology, emergency medicine, and GI surgery to describe a specific ulcer location and related risks. It is usually discussed in the context of upper abdominal pain, bleeding, or complications such as perforation.

A Gastric Ulcer is an open sore (mucosal break) in the lining of the stomach. It is a type of peptic ulcer disease, which refers to ulcers caused by acid-peptic injury. Clinicians use the term in gastroenterology, internal medicine, emergency care, and GI surgery. It is commonly discussed when evaluating upper abdominal pain, bleeding, or anemia.

A Peptic Ulcer is an open sore in the lining of the stomach or the first part of the small intestine. It forms when normal mucosal defenses are overwhelmed by acid, pepsin, medications, or infection. It is commonly discussed in gastroenterology clinics, emergency care, and inpatient medicine. It is also a frequent topic in endoscopy, Helicobacter pylori testing, and upper gastrointestinal bleeding workups.