Textbook of Urgent Care Medicine, Chapter 26, Gastrointestinal Bleeding

Published on October 26, 2026

Original author: Jeffrey Collins

Originally published in 2014. Substantially updated and clinically reviewed in 2026 to reflect current evidence, guidelines, and urgent care practice.

INTRODUCTION

Gastrointestinal bleeding (GI) may be described by location (upper versus lower), time course (acute versus chronic), and presentation (overt versus occult). A suspected small-bowel source may be considered when upper and lower endoscopic evaluation is unrevealing.

The clinical presentation, diagnosis, and treatment depend on the etiology, location, and chronicity of the bleeding, which can range from occult bleeding (heme-positive stools or new anemia) to life-threatening hemorrhage.

For the urgent care clinician, the first decision is whether the patient has active hemorrhage or impaired perfusion that requires immediate EMS transfer. A source may not be identified before transfer, and apparent stability does not exclude important bleeding. In patients without visible blood loss, unexplained iron-deficiency anemia requires appropriate outpatient evaluation rather than acute stool testing alone.

PRESENTATION

The general presenting signs and symptoms of a GI bleed are related to the degree of blood loss and may include:

Altered level of consciousness, confusion
Angina
Anxiousness
Cold, clammy extremities
Delayed capillary refill
Dyspnea on exertion
Fatigue
Orthostatic blood pressure
Pale skin, mucous membranes, and conjunctiva
Palpitations
Tachycardia
Weakness

Signs and symptoms of an upper GI bleed may include:

Abdominal pain
Black, tarry stools
Hematemesis (vomiting blood, or coffee-ground emesis)

Signs and symptoms of a lower GI bleed may include:

Blood in the toilet bowl
Bright red blood per rectum (hematochezia)
Black, tarry stools (melena)

Melena more often indicates an upper source, although small-bowel or right-sided colonic bleeding may also cause dark stools. Brisk upper GI hemorrhage may cause hematochezia, particularly when accompanied by shock.

In the pediatric population, the presentation of GI bleeding will vary with age and etiology. This becomes critical because history and physical exam findings may be minimal.

Neonates

Consider vitamin K deficiency bleeding, especially in home births.
Ask about maternal bleeding during birth to distinguish between true upper GI bleeding and swallowed maternal blood from the delivery or breastfeeding.
Consider congenital anomalies such as arteriovenous malformations and intestinal duplications.
Consider stress ulcers or gastritis in the premature infant or previously ill newborn.
Ill appearance, bilious vomiting, abdominal distention, poor perfusion, or substantial bleeding in a neonate warrants emergency pediatric evaluation; consider necrotizing enterocolitis in susceptible infants.

Infants and Toddlers

Consider milk protein intolerance, which can present as either upper or lower GI bleeding.
Always consider a swallowed or retained foreign body, especially if there was a choking episode even days or weeks before presentation.
Consider a Mallory-Weiss tear in a child who has been vomiting.
Consider esophageal varices, especially in children with a history of biliary atresia, cystic fibrosis, or parenteral nutrition or in children from outside the United States.
In children, consider unusual conditions:
Hereditary hemorrhagic telangiectasia (Rendu-Osler-Weber syndrome)
Kasabach-Merritt syndrome
The hereditary polyposis syndromes
Systemic mastocytosis
The hemophilias
Significant painless rectal bleeding may suggest a Meckel diverticulum; abdominal pain with episodic distress and bloody stool raises concern for intussusception. These require ED evaluation.

Older Children and Adolescents

Presentations may be similar to those for the adult population.
Consider pill esophagitis in those taking medications for acne or for other issues.
Ask about recent nosebleeds.
Ask about diet because several foods and medicines can give the stool a bloody appearance (e.g., red-dyed snack foods, beets, chocolate, flavored gelatins, red licorice, Kool-Aid, iron supplements, bismuth preparations).

TRIAGE PEARLS

Check vital signs to assess whether the patient has had significant blood loss (indicated by increased heart rate, decreased blood pressure, orthostasis).
Quickly assess the severity of the bleed and try to identify the potential sources.
The passing of bright red blood rectally usually suggests a lower GI source but may indicate a briskly bleeding upper GI source.
Repeat blood pressure, heart rate, respiratory rate, oxygen saturation, and mental status. Do not perform standing orthostatic measurements in a patient who may be unstable; hypotension is a late sign of hemorrhage in some patients.
Activate EMS for hematemesis with ongoing bleeding, large-volume hematochezia or melena with weakness or syncope, shock, confusion, ischemic symptoms, or other signs of impaired perfusion. An apparently normal single set of vital signs does not exclude significant hemorrhage.
Note any conditions that may affect future management (e.g., taking aspirin for coronary artery disease, taking warfarin for atrial fibrillation, taking diuretics for hypertension).

HISTORY PEARLS

Always ask about a history of GI bleeding.
Ask about the location of pain if present; for example:
Epigastric or left upper quadrant pain may point to a peptic ulcer.
Ask about what the patient was doing prior to the bleeding episode; for example:
Retching may point to a Mallory-Weiss tear.
Straining may point to a hemorrhoidal bleed.
Ask about any associated symptoms; for example:
Pain with swallowing and heartburn may point to an esophageal ulcer.
Weight loss and early satiety may point to a GI malignancy.
Ulcer symptoms are variable; pain relieved or worsened by food does not reliably distinguish gastric from duodenal ulcer. Diverticular bleeding is frequently painless.
Ask about a history of Helicobacter pylori infection and smoking (may point to peptic ulcer disease as a source).
Ask about a history of smoking and alcohol use (may point to malignancy as a cause).
Ask about a history of liver disease and alcohol use (may point to a coagulopathy, esophageal varices, or portal hypertensive gastropathy as a source).
Ask about a history of travel, about infectious exposures, and whether the patient has been recently tested for tuberculosis (may point to parasitic infections or colonic tuberculosis as an etiology).
Ask about a history of recent GI procedures (e.g., bleeding from a polypectomy site during colonoscopy) or prior GI surgery (may point to a marginal anastomotic site ulcer as a source).
Ask about a history of an abdominal aortic aneurysm or aortic graft (may point to an aortoenteric fistula as a source).
Ask about medications, including
Medications that can predispose to bleeding, such as aspirin, clopidogrel, warfarin, and nonsteroidal anti-inflammatory drugs
Medications that may confuse the clinical presentation, such as beta-blockers, bismuth, and iron
Include direct oral anticoagulants (apixaban, rivaroxaban, dabigatran, edoxaban), P2Y12 inhibitors, corticosteroids, and the time of the most recent anticoagulant dose; ask about prior thromboembolism, coronary stents, and the reason antithrombotic therapy was prescribed.
Always ask about comorbid illnesses that may affect current treatment and future management, including
Heart disease
Respiratory disease
Renal disease
Ask about the estimated number of episodes, amount and color of blood, dizziness, syncope, exertional symptoms, recent anemia or transfusion, and current or prior endoscopy. The patient’s estimate of blood volume is often imprecise.

PHYSICAL EXAM PEARLS

Assess the hemodynamic stability of the patient.
Examine the abdomen.
Examine the stool.
Always examine the patient thoroughly for signs of comorbid illness.
Look for pallor, altered mental status, diaphoresis, delayed capillary refill, abdominal tenderness or peritonitis, jaundice, ascites, and stigmata of chronic liver disease. A focused anorectal examination may identify a fissure or obvious external hemorrhoid when clinically appropriate.
Finding a hemorrhoid does not exclude a more proximal bleeding source. Do not allow examination or tests to delay transfer in an unstable patient.

DIAGNOSIS PEARLS

Complete blood count to assess for anemia; remember:
The initial hematocrit in an acute GI bleed can be normal.
A low mean corpuscular volume may point to a chronic bleed.
Overhydration can result in a falsely low hemoglobin level.
A point-of-care hemoglobin, when available and reliable, may assist assessment but cannot establish blood-loss severity or justify discharge on its own. A patient may have significant acute bleeding with a normal initial hemoglobin.
Serum chemistries and glucose (patients with an upper GI bleed may have an elevated ratio of blood urea nitrogen to creatinine [BUN:Cr ratio] of >20:1)
Liver function tests
Coagulation studies, including
Prothrombin time
Partial thromboplastin time
Prothrombin time and international normalized ratio
At the hospital, testing is selected according to severity and medications, usually including CBC, metabolic panel, coagulation studies when indicated, and type and screen/crossmatch for important bleeding. A normal INR does not measure the anticoagulant effect of most direct oral anticoagulants.
Nasogastric lavage is not recommended as a routine diagnostic test. A negative aspirate cannot exclude upper GI bleeding, and the procedure should not be performed in urgent care to decide whether transfer is necessary. [7]
Fecal occult blood testing (guaiac or immunochemical) is not intended to evaluate overt hematemesis, melena, or hematochezia and should not be used to exclude acute bleeding. Its result should not direct emergency disposition. [8]
Rectal examination and anoscopy for suspected hemorrhoidal bleeding
Imaging and endoscopy are receiving-facility decisions. CT angiography is increasingly important in ongoing, hemodynamically significant lower GI bleeding; hospitalized upper GI bleeding generally requires timely endoscopy. Do not delay transport to obtain abdominal radiographs. [4]
Electrocardiograms (ECGs; may need serial ECGs) to assess for cardiac ischemia, especially in patients with known cardiac risk factors and in the elderly
In patients with chest discomfort, ischemic symptoms, or significant anemia and cardiovascular disease, obtain a 12-lead ECG if immediately available without delaying EMS transfer. Serial troponin-based rule-out belongs to ED/hospital pathways or appropriately licensed laboratories, not the typical CLIA-waived urgent care center.

Risk Stratification

The Glasgow-Blatchford score (GBS) uses hemoglobin, BUN, systolic pressure, pulse, melena, syncope, liver disease, and heart failure. The American College of Gastroenterology suggests that patients with upper GI bleeding and a GBS of 0–1 may be considered for discharge after emergency department evaluation and appropriate follow-up. [1, 3]
The GBS was studied principally in hospital and ED populations and requires laboratory results. It must not be treated as an independent urgent-care discharge rule. AIMS65 mainly predicts mortality, and the full Rockall score requires endoscopic findings. [2, 3]
Lower GI bleeding risk tools such as the Oakland score can support ED risk assessment but are not a substitute for judgment or validated urgent care pathways. [4]

Finding at urgent care	Action
Active major bleeding, syncope, altered mental status, hypotension, poor perfusion, ischemic symptoms	EMS transfer for resuscitation, blood products, and endoscopic/interventional management.
Hematemesis, melena with symptoms, ongoing or substantial hematochezia, suspected variceal or aortoenteric bleeding	Emergency department evaluation; use EMS if ongoing bleeding, high-risk features, or physiologic concern.
Small streaks of bright red blood with convincing fissure/hemorrhoid source, well appearing and without red flags	Consider outpatient management only after individualized examination and documented follow-up; reassess any recurrent bleeding.
Unexplained iron-deficiency anemia or intermittent occult blood without acute bleeding	Arrange timely primary care/GI investigation (often colonoscopy and/or endoscopy as indicated); avoid using acute guaiac as a rule-out test.

TREATMENT PEARLS

All patients with hemodynamic instability and/or active bleeding should be examined immediately.
Assess airway and breathing, keep the patient at rest, activate EMS when major bleeding is suspected, and repeat vital signs. Give supplemental oxygen for hypoxemia or respiratory compromise, not automatically to every patient. Protect the airway when compromised; advanced airway management is generally an EMS/ED responsibility.
Place large-bore peripheral intravenous access when trained staff and supplies are available and it will not delay transfer. For shock, use cautious isotonic crystalloid while arranging prompt blood-product resuscitation at the hospital; avoid excessive fluid administration.
Patients with suspected major upper GI bleeding should generally avoid oral intake pending ED assessment and possible endoscopy.
At the receiving hospital, management may include transfusion, proton pump inhibitors for nonvariceal bleeding, endoscopic hemostasis, or CT angiography and embolization for selected lower GI bleeding. Transfusion decisions in unstable hemorrhage depend on the clinical situation, not a single hemoglobin threshold.
Suspected variceal bleeding in cirrhosis requires emergency evaluation. Hospital treatment includes early vasoactive therapy (such as octreotide), intravenous antibiotic prophylaxis, and prompt endoscopy. Do not delay transfer to initiate these treatments in a typical urgent care center. [6]
Do not independently reverse or discontinue anticoagulants or antiplatelets without considering the severity of bleeding and thrombotic indication. Reversal decisions for life-threatening hemorrhage are made with ED/hospital teams; aspirin taken for secondary cardiovascular prevention is generally continued or promptly resumed after hemostasis under specialist guidance. [5]

DISPOSITION PEARLS

The presence of any of the following suggests the need for a hospital transfer:

Unstable vital signs at any point in the visit
Continued active bleeding
History of significant initial blood loss
Advanced age
Presence of a comorbid illness or illnesses
The presence of a coagulopathy
Decreased hematocrit from baseline
Abnormal electrocardiographic findings
In addition, hematemesis, melena with associated symptoms, substantial hematochezia, syncope, anticoagulant-associated bleeding, known cirrhosis/varices, suspected aortoenteric fistula, or inability to assure timely follow-up favor emergency evaluation.

A limited outpatient pathway may be appropriate when a patient is well appearing, has a clearly minor anorectal source and no evidence of important ongoing blood loss, and can obtain reliable follow-up. This is a clinical judgment rather than a checklist based on normal hematocrit, guaiac results, or nasogastric aspirate.

A patient with suspected upper GI bleeding should not be discharged from typical urgent care solely because vital signs and an initial hemoglobin appear normal. ED-based very-low-risk GBS pathways do not automatically apply to urgent care.

MEDICOLEGAL PEARLS

All patients with abnormal vital signs who are being sent home must have some discussion documented in their chart regarding the etiology of the abnormality.
When patients have physical exam findings suggestive of a GI bleed, the most prudent course of action is to send them for further evaluation.
Be especially cautious when evaluating patients taking warfarin and other blood thinners.
If you do elect to discharge a patient to home, document the absolute necessity for close follow-up (within 24 to 48 hours).
Document the pattern and amount of bleeding, repeat vital signs, perfusion assessment, relevant antithrombotic drugs, objective test limitations, transfer discussion, and accepting facility/EMS plan when applicable. Normal tests do not negate a concerning history.
For patients declining recommended ED transfer, document decision-making capacity, discussion of material risks, alternatives, explicit escalation precautions, and the refusal. A signature alone does not replace that discussion.

REFERENCES

Blatchford O, Murray WR, Blatchford M. A risk score to predict need for treatment for upper-gastrointestinal haemorrhage. Lancet. 2000;356(9238):1318-1321. doi:10.1016/S0140-6736(00)02816-6 Source
Saltzman JR, Tabak YP, Hyett BH, et al. A simple risk score accurately predicts in-hospital mortality, length of stay, and cost in acute upper GI bleeding. Gastrointest Endosc. 2011;74(6):1215-1224. doi:10.1016/j.gie.2011.06.024 Source
Laine L, Barkun AN, Saltzman JR, Martel M, Leontiadis GI. ACG clinical guideline: upper gastrointestinal and ulcer bleeding. Am J Gastroenterol. 2021;116(5):899-917. doi:10.14309/ajg.0000000000001245 Source
Sengupta N, Feuerstein JD, Jairath V, et al. Management of patients with acute lower gastrointestinal bleeding: an updated ACG guideline. Am J Gastroenterol. 2023;118(2):208-231. doi:10.14309/ajg.0000000000002130 Source
Abraham NS, Barkun AN, Sauer BG, et al. American College of Gastroenterology–Canadian Association of Gastroenterology clinical practice guideline: management of anticoagulants and antiplatelets during acute gastrointestinal bleeding and the periendoscopic period. Am J Gastroenterol. 2022;117(4):542-558. doi:10.14309/ajg.0000000000001627 Source
Kaplan DE, Ripoll C, Thiele M, et al. AASLD practice guidance on risk stratification and management of portal hypertension and varices in cirrhosis. Hepatology. 2024;79(5):1180-1211. doi:10.1097/HEP.0000000000000647 Source
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Drescher MJ, Stapleton S, Britstone Z, Fried J, Smally AJ. A call for a reconsideration of the use of fecal occult blood testing in emergency medicine. J Emerg Med. 2020;58(1):54-58. doi:10.1016/j.jemermed.2019.09.026 Source
Piccirillo M, Pucinischi V, Mennini M, et al. Gastrointestinal bleeding in children: diagnostic approach. Ital J Pediatr. 2024;50(1):13. doi:10.1186/s13052-024-01592-2 Source