| Age Group | Etiology |
|---|---|
| Neonate | Swallowed maternal blood |
| Gastritis | |
| Necrotizing enterocolitis | |
| Coagulopathy in the presence of infection | |
| Congenital coagulation deficiency | |
| Esophagitis | |
| Vascular malformation | |
| Hemorrhagic disease of the newborn | |
| Idiopathic | |
| 1 Month-1 year | Peptic ulceration |
| Curling ulcer | |
| Duplication cyst | |
| Foreign body | |
| Gastric or esophageal varices | |
| Vascular malformation | |
| Bowel obstruction | |
| Epistaxis | |
| Hemoptysis | |
| Reflux esophagitis | |
| Stress gastritis | |
| Medication-induced gastritis (eg, NSAIDs or aspirin use) | |
| Caustic ingestion | |
| 1–5 Years | Peptic ulceration |
| Stress gastritis | |
| Medication-induced gastritis (eg, NSAIDs or aspirin use) | |
| Varices | |
| Epistaxis | |
| Hemoptysis | |
| Mallory-Weiss tear | |
| Gastroesophageal reflux | |
| Caustic ingestion | |
| Bowel obstruction | |
| Vasculitis | |
| Crohn disease | |
| Hemophilia | |
| 5–18 Years | Varices |
| Peptic ulceration | |
| Coagulation disorders | |
| Immune thrombocytopenic purpura | |
| Chemotherapy | |
| Crohn disease | |
| H. pylori gastritis | |
| Gastroesophageal reflux | |
| Mallory-Weiss tear | |
| Caustic ingestion |
NSAID, nonsteroidal anti-inflammatory drug.