Mallory-Weiss tear: symptoms, treatment, and when to worry
Last updated September 3, 2026.
A Mallory-Weiss tear is a rip in the lining where the food pipe meets the stomach, caused by forceful vomiting or retching, and it produces vomiting of blood. It follows a recognizable script: several bouts of vomiting, often after heavy drinking or a stomach bug, then vomit containing bright red blood or looking like coffee grounds. Most tears stop bleeding on their own and heal within days, but vomiting blood always warrants same-day assessment.
What brings it on?
Anything that produces violent retching: binge drinking is the classic, with stomach bugs, food poisoning, severe morning sickness, and bulimia also on the list, along with intense coughing or straining. The tear is a few millimeters to a couple of centimeters long, in the stretchy zone just below the food pipe's end. A hiatus hernia raises the risk. The bleeding ranges from streaks to, occasionally, heavy, and heavier bleeding rides on risk factors like blood thinners, liver disease, and older age.
What actually helps?
- Same-day assessment for any vomited blood: even streaks earn an urgent same-day review, because the source matters and only assessment distinguishes a self-healing tear from the dangerous alternatives.
- Most heal themselves: the majority of tears stop bleeding spontaneously and heal over days, with acid-suppressing medicine supporting the repair.
- Endoscopy when bleeding is significant: a camera procedure both confirms the diagnosis and treats ongoing bleeding, with clips, injections, or heat sealing, usually in one sitting.
- Rest the stomach: nothing by mouth briefly in monitored cases, then gentle reintroduction; anti-sickness medication stops the retching that caused the tear.
- Address the trigger: if alcohol binges or an eating disorder pattern sits behind the vomiting, that conversation is part of preventing the next one.
When is it an emergency?
Vomiting blood is always a same-day emergency assessment, and call 911 for the heavy version: vomiting large amounts of bright red blood or material like coffee grounds, black tarry stools, dizziness or fainting, a racing heart, cold clammy skin, or severe abdominal pain. Those signal significant bleeding that cannot wait. Do not drive yourself; the risk is faintness at the wheel. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
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Common questions
Is a Mallory-Weiss tear serious?
Usually not: most tears bleed briefly, stop on their own, and heal within days without any procedure. The reason vomiting blood still gets assessed the same day is that the label can only be applied after the dangerous sources are excluded, and because a minority of tears bleed heavily, especially in people on blood thinners, with liver disease, or in older age. The tear is common and benign; the symptom is never to be home-diagnosed.
What does Mallory-Weiss bleeding look like?
Vomited blood after a run of forceful vomiting: bright red streaks or clots, or darker material resembling coffee grounds, which is blood partly digested by stomach acid. The sequence is the clue: normal vomit first, blood appearing after the retching has gone on. Black, tarry, foul stools mean blood has passed through the gut, which accompanies bigger bleeds. Any of these patterns earns same-day assessment.
How is a Mallory-Weiss tear diagnosed and treated?
When assessment finds it likely, stable minor cases may simply be observed with acid-suppressing medicine. Significant or ongoing bleeding gets an endoscopy: a camera passed under sedation that sees the tear directly and can treat it on the spot with clips, injections, or heat. Most people go home the same or next day, and recurrence is uncommon unless the retching trigger repeats.
Can coughing really tear the food pipe?
Severe, sustained coughing or retching can, because the mechanism is the violent pressure spike, not the vomit itself. Whooping-type coughing fits, choking, heavy lifting straining, and seizures have all produced tears. The much commoner route is vomiting, and the commonest accelerant is binge drinking. Whatever the trigger, blood after forceful retching or coughing is the same instruction: same-day assessment.
Will it happen again?
Usually no: a healed tear leaves no ongoing weakness, and recurrence is uncommon. The risk lives in the trigger repeating: another drinking binge, another stomach bug with violent vomiting, untreated bulimia, or severe morning sickness without anti-sickness treatment. Preventing recurrence means treating the retching, including prompt anti-nausea medication in illnesses for those who have torn before.
What is the difference between a Mallory-Weiss tear and a bleeding ulcer?
Both vomit blood, but the machinery differs. A Mallory-Weiss tear is a fresh rip from mechanical force after retching, typically with clear normal vomit first. An ulcer is an eroded crater, often from Helicobacter infection or anti-inflammatory painkillers, and it bleeds without the vomiting trigger, often with preceding burning pain. Varices, the third big cause, accompany liver disease. The endoscopy distinguishes them, which is why significant bleeding gets one.