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Published on: 7/14/2026
What could be the causes of vomiting blood and when should I seek help?
Vomiting blood (hematemesis) is often a sign of bleeding somewhere in the upper digestive tract, most commonly from a stomach ulcer, a tear in the esophagus (Mallory-Weiss tear), inflammation (gastritis or esophagitis), or ruptured blood vessels. The blood may appear bright red or resemble dark coffee grounds, depending on the source and how long it has been in the stomach.
Hematemesis is considered a medical emergency, especially when paired with warning signs such as dizziness, rapid heartbeat, black or tarry stools, severe abdominal pain, shortness of breath, or fainting. These symptoms can indicate significant blood loss that requires immediate treatment.
Because vomiting blood can stem from many conditions—ranging from mild irritation to life-threatening internal bleeding—understanding the possible cause is critical. A free, instant, online symptom check can help you quickly identify likely causes based on your specific symptoms and guide you on the right next steps, whether that means calling emergency services, seeing a specialist, or monitoring at home. Taking a few minutes now could make a meaningful difference in how quickly you get the care you need.
Reviewed for medical accuracy: 07/14/2026
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Vomiting blood means you may have bleeding in your upper digestive system, such as in your stomach or esophagus. This condition is called hematemesis.
One common cause is a small tear, sometimes from intense vomiting, which is known as a Mallory-Weiss tear. Other possible reasons are stomach ulcers or blood vessel problems (like esophageal varices) that can bleed more seriously. While sometimes a minor tear might clear up on its own, other causes represent more serious conditions.
Look for warning signs like dizziness, feeling very weak, a rapid heartbeat, or if the blood looks bright red or like coffee grounds. These symptoms can indicate a significant loss of blood or ongoing bleeding and should result in you calling emergency services immediately.
If you notice any of these problems when you vomit blood, it is important to get medical help immediately by calling your doctor or going to an emergency room. To better understand your symptoms and get personalized guidance before seeking care, you can use Ubie's free AI-powered symptom checker. Early medical evaluation can help find out the cause and decide on the right treatment, which is crucial for your health.
(References)
Wilson ID. Hematemesis, Melena, and Hematochezia. In: Walker HK, Hall WD, Hurst JW, editors. Clinical Methods: The History, Physical, and Laboratory Examinations. 3rd edition. Boston: Butterworths; 1990. Chapter 85.
Kim BS, Li BT, Engel A, Samra JS, Clarke S, Norton ID, Li AE. Diagnosis of gastrointestinal bleeding: A practical guide for clinicians. World J Gastrointest Pathophysiol. 2014 Nov 15;5(4):467-78. doi: 10.4291/wjgp.v5.i4.467. PMID: 25400991; PMCID: PMC4231512.
Boysen SR. Gastrointestinal Hemorrhage. Small Animal Critical Care Medicine. 2015:630–4. doi: 10.1016/B978-1-4557-0306-7.00119-7. Epub 2014 Jun 25. PMCID: PMC7152172.
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