Medically Reviewed by
Dr. Bharat Pothuri, MD, FACG
| Updated 07-23-2026
Melena is black, tarry stool caused by digested blood. The GastroDoxs GutSignal Decode™ helps confirm overt gastrointestinal bleeding, estimate risk, and locate the source.
MD, FACG
4.7 · 1,900+ Reviews
The workup begins with the symptom pattern, checks urgency, and selects testing that can change the care plan.
The stool pattern, odor, vomiting, pain, medicine exposure, and liver history establish that melena is likely.
Clinical features support decisions about hospital care, endoscopy timing, and intervention.
Upper endoscopy examines the most likely bleeding territory and can provide hemostasis.
Repeat endoscopy, colonoscopy, capsule, enteroscopy, or vascular imaging may be needed.
The timing, trigger, associated symptoms, and progression can direct the evaluation toward different causes.
A painless ulcer, vascular lesion, portal-hypertensive source, or tumor may bleed.
Peptic ulcer disease becomes more likely.
A Mallory-Weiss tear may follow forceful vomiting.
Varices and portal-hypertensive bleeding require urgent care.
Anticoagulants or antiplatelet medicines may worsen bleeding and affect management.
Rebleeding may require repeat endoscopy, embolization, surgery, or small-bowel evaluation.
Your guardians. GastroDoxs GutGuardians™ is an elite team of board-certified gastroenterologists - a physician-led defense force of specialists, systems, and solution pathways working together to protect, detect, solve, and defend your digestive health through expert GI evaluation, advanced diagnostic screening, and endoscopic evaluation - commanded from your first concern to your last follow-up, and every critical stage in between.
Your answers. GastroDoxs GutSignal Decode™ cracks your body's distress codes - delivering expert gastroenterologist interpretation of your GI symptoms, lab results, endoscopy findings, conditions, and digestive imaging across the full spectrum of digestive disease - translating every signal your gut sends into a confirmed diagnosis and a clear, board-certified plan of attack built entirely around you.
Testing is selected according to urgency, suspected location, prior results, and the clinical question.
Trends may be more useful than one early hemoglobin.
A disproportionate BUN rise may support an upper source but is not diagnostic.
Assesses cirrhosis, synthetic function, and medication-related risk.
Identifies the source and signs of active or recent hemorrhage.
Used when upper endoscopy is negative or another source remains possible.
May localize active bleeding and guide embolization.
| Finding or Pattern | Why It Matters | Common Next Step |
|---|---|---|
| Melena with stable vital signs | Important bleeding may still be present. | Prompt assessment, labs, risk review, and endoscopy planning. |
| Melena with fainting or breathlessness | Bleeding may affect circulation or oxygen delivery. | Emergency resuscitation and urgent source control. |
| Melena with NSAID use or ulcer symptoms | A peptic ulcer is likely. | Endoscopy, H. pylori testing, and acid suppression. |
| Melena with cirrhosis | Variceal or portal-hypertensive bleeding is possible. | Emergency protocol and urgent endoscopy. |
| Melena after a negative EGD | The source may be intermittent or beyond reach. | Review test quality and consider further GI or vascular testing. |
A procedure is recommended only when its result or treatment capability can change the next decision.
| Care Setting | What It Handles Best | Diagnostic Depth | Best Fit |
|---|---|---|---|
| GastroDoxs | GI follow-up after active bleeding is stabilized | High | Source review, endoscopy follow-up, anemia, ulcer or liver care |
| Primary Care | Stable medication and anemia follow-up | Moderate | Coordination when no active bleeding signs are present |
| Emergency Department | Immediate stabilization and urgent GI coordination | Emergency | Active bleeding, fainting, breathlessness, shock signs, or repeated hematemesis |
Record first and latest melena, frequency, vomiting blood, pain, dizziness, and return to normal stool.
Include NSAIDs, aspirin, blood thinners, steroids, iron, bismuth, and supplements.
Bring ulcer, H. pylori, endoscopy, cirrhosis, blood count, and hospital records.
The goal is to determine whether bleeding continues and which lesion is likely.
A single procedure may locate the source and control it.
Recurrent melena is approached with small-bowel, colon, or vascular testing.
Melena evaluation at GastroDoxs is guided by experienced digestive specialists who help connect symptoms, testing, and next-step treatment.
The patient learns that melena usually represents older blood from higher in the digestive tract.
Symptoms, vital signs, laboratory trends, and medicines show whether hospital care is needed.
Upper endoscopy looks for ulcers, tears, varices, vascular lesions, inflammation, or tumors.
Recurrent melena triggers repeat hemostasis, radiology, surgery, or small-bowel evaluation.
The plan addresses H. pylori, medicine risks, liver disease, anemia, and follow-up.
Treatment targets the source and may include stabilization, transfusion, endoscopic hemostasis, acid suppression, H. pylori therapy, variceal treatment, medicine changes, embolization, or surgery.
Yes. It indicates GI bleeding until proven otherwise and can cause anemia, shock, recurrent bleeding, or death.
Contact a clinician promptly. Go to an emergency department for dizziness, fainting, weakness, breathlessness, chest pain, vomiting blood, repeated melena, severe pain, or rapid heartbeat.
Melena is the medical term for black, tarry, usually strong-smelling stool produced when blood is digested in the GI tract.
It can be. Risk depends on ongoing bleeding, symptoms, vital signs, hemoglobin, medicines, liver disease, and other conditions.
Black tarry stool, vomiting blood, dizziness or fainting, rapid heartbeat or breathlessness, and increasing weakness are concerning signs.
Melena may continue for several bowel movements after bleeding stops. Continued or recurring stool can mean ongoing bleeding.
Do not use food as treatment. Active bleeding may require fasting before endoscopy. After stabilization, follow the treating team’s diet instructions.
It is often jet black, shiny, sticky or tar-like, and has a strong odor.
Melena is not cancer, but upper digestive tumors can bleed. Ulcers and other noncancerous lesions are more common.
Risk rises with ulcers, H. pylori, NSAIDs, aspirin, blood thinners, cirrhosis, prior bleeding, vascular lesions, and some cancers.
Cancer-related blood may be bright red, maroon, black, or hidden depending on location and bleeding rate.
Digested blood, iron supplements, and bismuth medicines are three common causes. Activated charcoal and dark foods can also discolor stool.
There is no reliable amount a patient can estimate. Appearance depends on location, speed of transit, and digestion.
Causes include peptic ulcers, gastritis, esophagitis, tears, varices, portal-hypertensive changes, vascular lesions, tumors, and less often small-bowel or right-colon bleeding.
Melena should be treated as GI bleeding until confirmed otherwise. Seek emergency care for blood-loss symptoms; GastroDoxs can provide follow-up after stabilization.
