Dark vomit is often old blood rather than anything you ate. Stomach acid turns blood that has sat there for a while from red to a dark brownish colour.1Worcestershire Acute Hospitals NHS Trust. Upper Gastrointestinal Bleeding A dark shade usually means the bleeding is in the stomach or gullet and has been going on long enough to change, which makes it more than a minor problem. It needs a doctor the same day, or an ambulance if there are signs of heavy blood loss. Not every dark vomit is blood, though. Dark food, dark drinks or swallowed blood from a nosebleed can look similar, and dark green vomit points to bile or a blockage instead.
When Dark Vomit Needs Emergency Care
Signs of serious blood loss include:
- Feeling faint or dizzy, or weak when you stand up.2ER of Fort Worth. Vomiting Blood Emergency Causes
- A fast heartbeat or rapid, shallow breathing.3nhs.uk. Vomiting blood
- Cold, clammy, pale skin.4nhs.uk. Vomiting blood
- Confusion or feeling generally very unwell.5nhs.uk. Vomiting blood
- Tummy pain.6nhs.uk. Vomiting blood
- Black, tarry poo, which means blood has also passed through the gut.7ER of Fort Worth. Vomiting Blood Emergency Causes
With any of these signs, call 999 or 911 rather than driving yourself in.8ER of Fort Worth. Vomiting Blood Emergency Causes Without these signs, vomit that may contain blood still needs same-day assessment by a doctor.9nhs.uk. Vomiting blood
While you wait for help, lie the person on their side so they can’t choke if they vomit again. Don’t give food or drink, because a camera test may be needed soon. Keep a sample or take a photo of the vomit to show the medical team, and write down the person’s medicines, especially blood thinners and painkillers.
Even one small episode matters. Bleeding in the stomach can stop and then start again without warning, and the amount you see in the vomit doesn’t show how much blood is still in the gut.
Someone who can’t explain their symptoms needs a closer look. In young children, watch for pale skin, floppiness or unusual sleepiness. In older adults, new confusion can be the main sign of blood loss.
When you call, be ready to say roughly when the vomiting started, how many times it has happened and what colour it was each time, because this helps staff judge how fast the bleeding may be. Mention any recent heavy drinking, long-term indigestion or known liver problems, since these point toward likely sources of bleeding. If the person has fainted or become hard to wake, say so straight away, as that changes how urgently the crew is sent.
How to Tell Coffee-Ground Blood From Food or Drink
Blood in vomit can be bright red, or it can be dark, grainy material that looks like coffee grounds.10Clinic Hunter. Vomiting Blood After Gastric Sleeve or Bypass: When to Be Concerned Fresh blood stays red, while blood that has been partly digested turns dark.11Clinic Hunter. Vomiting Blood After Gastric Sleeve or Bypass: When to Be Concerned
Several things can imitate it. Brown vomit can come from eating lots of chocolate, brownies or other dark foods.12NYC Gastroenterologist | Manhattan Gastroenterology. Vomit Color Guide: What Different Colors May Mean Dark drinks such as cola, coffee or red wine can also tint vomit. Iron tablets and bismuth stomach remedies can turn stools black and may darken vomit.
Dark food vomit usually still shows pieces of what was eaten, such as bits of chocolate, rice or fruit skin, mixed through a smooth liquid. Blood that has sat in the stomach tends to look like fine dark specks suspended in thin liquid, though appearance alone can’t reliably tell the two apart. Red food dyes in sweets, drinks or medicines can make vomit look red or pink, which can frighten people into thinking it is blood.
You can also vomit blood you swallowed, such as from a nosebleed.13nhs.uk. Vomiting blood A baby feeding on a cracked, bleeding nipple can vomit the mother’s blood.14nhs.uk. Vomiting blood In children, a nosebleed is a more common reason for vomiting blood than a stomach ulcer.15Case Based Pediatrics For Medical Students and Residents. Gastrointestinal Bleeding and Peptic Ulcer Disease
Don’t rely on your own guess. Even experts can’t be sure from colour alone without tests, so if there’s any doubt, treat it as possible blood and get checked.
If you can, look at the vomit in good light, since dim bathroom lighting makes both blood and food look darker than they are. Wear gloves or avoid touching it, and wash your hands well afterwards, because blood and stomach contents can carry germs.
What Causes Bleeding in the Stomach or Gullet
A stomach or duodenal ulcer is the most common cause of bleeding in the upper gut.16Nature Reviews Gastroenterology & Hepatology. Therapeutic endoscopy for acute upper gastrointestinal bleeding An ulcer is an open sore in the lining that can wear into a blood vessel. The stomach makes strong acid, and the lining is normally protected by a layer of mucus; an ulcer forms when that protection fails in one spot. Once the sore reaches a blood vessel, bleeding can be slow and steady or sudden and heavy, depending on the size of the vessel.
The two most common causes of bleeding ulcers are anti-inflammatory painkillers and a stomach bacterium called H. pylori.17PubMed. Bleeding peptic ulcer in the elderly: risk factors and prevention strategies The painkillers reduce the substances that help the stomach keep its protective mucus, leaving the lining more exposed to acid. Ulcers caused by them are also more likely to bleed, because these drugs make blood clot less well.18PubMed. Bleeding peptic ulcer in the elderly: risk factors and prevention strategies H. pylori lives in the stomach lining of many people, and most never have problems, but in some it inflames the lining and leads to ulcers.
Before an ulcer bleeds, many people have burning or gnawing pain in the upper belly, often between meals, or indigestion that eases with food or antacids and then returns. Some bleeding ulcers cause no pain at all beforehand, especially in older people.
An inflamed stomach lining or gullet can develop small sores that bleed slowly over time.19SiPhox Health. Why am I vomiting coffee-ground material? That slow bleeding has time to turn dark in the stomach, giving coffee-ground vomit. Heavy drinking and repeated severe vomiting can also damage the lining.
Less commonly, swollen veins in the gullet, often linked to liver disease, can bleed heavily.20PubMed Central. Diagnosis and Management of Upper Gastrointestinal Bleeding Swallowing strong acids or alkalis such as cleaning products can cause deep ulcers and black damage in the gut.21PubMed Central. Evaluation and Management of Caustic Injuries from Ingestion of Acid or Alkaline Substances If a child may have swallowed a chemical, call emergency services or poisons advice straight away. Don’t make the child vomit, and keep the container to show the medical team.
Who Is Most at Risk
The risk of gut bleeding rises clearly after 65 and further after 75.22PubMed. Bleeding peptic ulcer in the elderly: risk factors and prevention strategies Older people are more often on regular painkillers for arthritis or aspirin for heart protection, which adds to the ulcer risk. They also tend to take several medicines at once, so an interaction between a painkiller and a blood thinner is easier to miss.
An older heart and brain cope less well with losing blood, so a bleed that a younger person would manage can cause a heart problem or confusion. Symptoms can be quieter too: an older parent may not complain of pain and may simply seem tired or unsteady. Vomiting dark material in an older parent should be taken seriously even if they say they feel fine.
Anti-inflammatory painkillers such as ibuprofen, naproxen and aspirin, often called NSAIDs on labels, raise the risk of bleeding ulcers.23PubMed. Bleeding peptic ulcer in the elderly: risk factors and prevention strategies In older people, taking these painkillers with a blood thinner raised the risk of a bleeding ulcer about 13 times.24PubMed. Concurrent use of nonsteroidal anti-inflammatory drugs and oral anticoagulants places elderly persons at high risk for hemorrhagic peptic ulcer disease Steroid tablets, a past ulcer or bleed, ongoing indigestion and drinking alcohol add to the risk for people on these painkillers.25PubMed. Bleeding peptic ulcer in the elderly: risk factors and prevention strategies If you take a blood thinner, ask your doctor or pharmacist before using any anti-inflammatory painkiller.
Check labels, because many cold and flu remedies contain ibuprofen or aspirin. Paracetamol doesn’t carry the same ulcer risk, though it has its own dose limits. Never stop a prescribed blood thinner on your own; ask your doctor first.
Dark Green Vomit and Foul-Smelling Brown Vomit
Bile is a greenish-yellow digestive fluid that colours vomit when the stomach is empty.26Centre for Gastrointestinal Health. Causes & Treatments of Vomit Colours | Centre for GI Health Green vomit after repeated vomiting with a bug is therefore common, though it can also signal a blockage, described below. Bile appears as a yellow to green, often stringy liquid and tastes bitter, which helps tell it from food or blood. It looks darkest green when concentrated, which can happen after a long gap without eating. Bile reflux can also cause sour, very acidic-tasting vomit.27Centre for Gastrointestinal Health. Causes & Treatments of Vomit Colours | Centre for GI Health
A blocked bowel can push its contents back into the stomach, causing dark green vomit.28Centre for Gastrointestinal Health. Causes & Treatments of Vomit Colours | Centre for GI Health Thick, foul-smelling vomit that looks like poo suggests a blockage lower down the bowel.29HPC Consultation Services. Bowel Obstruction These need emergency care. A blockage is more likely with cramping belly pain that comes in waves, a swollen, tight belly, no poo or wind for a day or more, or vomiting that keeps returning.
Dark green vomit in a newborn is a surgical emergency.30Surgery (United Kingdom). Paediatric surgery – II Bilious vomiting in the newborn It can mean the gut has twisted, which can cut off its blood supply and cause death if not treated quickly.31Surgery (United Kingdom). Paediatric surgery – II Bilious vomiting in the newborn Doctors are especially concerned when a baby has green vomit with a tender tummy or seems to be getting weaker.32PubMed Central. Midgut volvulus with complete malrotation in an infant: First case report from Somalia
What Happens at the Hospital
On arrival, staff check pulse, blood pressure and breathing first, since these show how much blood may have been lost. A drip is usually put into a vein so fluids and, if needed, blood can be given quickly. You will be asked about medicines, alcohol and previous ulcers, which is why a written list helps.
Blood tests check how much blood you have lost. A blood count shows how much haemoglobin you have, which falls as blood is lost, though it may look normal in the first hours of a sudden bleed. Repeat tests are often taken, so a normal first result is not necessarily reassuring. Clotting tests show how well your blood forms clots, especially if you take a blood thinner. A kidney blood test result can also give doctors a clue that bleeding is in the upper gut.33Indonesian Journal of Clinical Pathology and Medical Laboratory. Analysis of Blood Urea Nitrogen/Creatinin Ratio to Predict the Gastrointestinal Bleeding Tract Site
The main test is an endoscopy, a thin camera passed through the mouth into the stomach.34Nature Reviews Gastroenterology & Hepatology. Therapeutic endoscopy for acute upper gastrointestinal bleeding You’re usually given a throat spray or sedation, it takes around 15 minutes, and you may have a sore throat afterwards.
During the camera test doctors can inject, seal with heat, or clip a bleeding ulcer.35Nature Reviews Gastroenterology & Hepatology. Therapeutic endoscopy for acute upper gastrointestinal bleeding Bleeding veins in the gullet are usually treated with small bands.36PubMed Central. Diagnosis and Management of Upper Gastrointestinal Bleeding Using two methods together cuts the chance of an ulcer bleeding again to about 1 in 10.37Nature Reviews Gastroenterology & Hepatology. Therapeutic endoscopy for acute upper gastrointestinal bleeding A clean ulcer with no sign of recent bleeding may need only medicine.38Nature Reviews Gastroenterology & Hepatology. Therapeutic endoscopy for acute upper gastrointestinal bleeding
Afterwards, acid-reducing medicine is usually given to help the ulcer heal. You may be tested for H. pylori and treated with antibiotics, and your painkillers may be changed.
When Your Dog Vomits Something Dark
Very dark brown or black coffee-ground vomit in a dog can mean digested blood from an ulcer.39Chewy. Why Is My Dog Throwing Up Black or Dark Brown Vomit? Causes include ulcers, swallowed human medicines or rat poison, and objects that damage the gut.40Big Dog Pet Foods. Types of dog vomit and what it means (vomit guide) Contact a vet right away rather than waiting for normal hours.41GSVS Veterinary Emergency Care Toms River. Dog Vomiting Blood: How to Handle This Veterinary Emergency Repeated vomiting, weakness, pale gums or belly pain make it an emergency.42GSVS Veterinary Emergency Care Toms River. Dog Vomiting Blood: How to Handle This Veterinary Emergency
Pale or white gums, fast breathing or collapse suggest significant blood loss and mean going to a vet immediately. Black, tarry poo carries the same meaning as in a person: blood has passed through the gut.
Human painkillers such as ibuprofen and aspirin can cause stomach ulcers in dogs and should never be given unless a vet has prescribed them. Rat poison stops blood clotting, and signs can appear days after the dog ate it, so tell the vet even if it was a while ago. Chewed toys, bones or socks can damage the gut lining or cause a blockage.