Gastritis is inflammation of the stomach lining. If the lining develops raw areas, called erosions, or ulcers, it can bleed. Bleeding may appear as red blood in vomit, vomit that resembles coffee grounds, or black, tarry stools; sometimes it is hidden. Vomiting blood or passing black, tarry stools needs urgent medical care because gastrointestinal bleeding can become dangerous.
How Are Gastritis and Gastrointestinal Bleeding Connected?
The stomach lining protects the underlying tissue from stomach acid and digestive juices. Gastritis occurs when this lining becomes inflamed. In some cases, the damage extends beyond inflammation and creates erosions or ulcers that can expose small blood vessels and cause bleeding.
Not everyone with gastritis develops bleeding. Some people have no noticeable symptoms, while others experience indigestion, nausea, vomiting, or discomfort in the upper abdomen. Bleeding can occur without much warning and may be the first obvious sign that the stomach lining has been damaged.
According to the Merck Manual, erosive gastritis can cause bleeding even when other symptoms are limited. The amount of bleeding depends on the extent of the injury and other clinical factors.
What Causes Gastritis That May Lead to Bleeding?
Several conditions and exposures can inflame or damage the stomach lining. Identifying the underlying cause helps healthcare professionals choose appropriate treatment and reduce the chance of further injury.
- Helicobacter pylori (H. pylori) infection: This bacterial infection is a common cause of gastritis and can contribute to peptic ulcers, which may bleed.
- Nonsteroidal anti-inflammatory drugs (NSAIDs): Medicines such as ibuprofen, naproxen, and aspirin can damage the stomach's protective lining and increase the risk of ulcers and bleeding, particularly with ongoing use.
- Alcohol: Alcohol can irritate the stomach lining and contribute to erosive damage.
- Severe physical illness: Serious injuries, major burns, sepsis, and critical illness can be associated with stress-related damage to the stomach lining.
- Autoimmune gastritis: In this condition, the immune system attacks cells in the stomach lining. Its complications and management differ from those of erosive gastritis.
- Other medical conditions or treatments: Certain inflammatory diseases, infections, chemotherapy, and radiation therapy may affect the stomach lining in some circumstances.
The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) identifies H. pylori infection, certain medicines, alcohol, and serious illness among the causes of gastritis or related stomach-lining damage. The relevant cause is not always obvious from symptoms alone.
What Are the Warning Signs of Gastrointestinal Bleeding?
Bleeding from the stomach may be visible or hidden. Its appearance can offer useful information to clinicians, but it does not identify the cause or location with certainty. Bleeding elsewhere in the digestive tract can produce some of the same signs.
- Red blood in vomit: Vomiting fresh-looking blood can indicate bleeding in the upper digestive tract.
- Vomit resembling coffee grounds: Dark, grainy material in vomit may represent blood that has been exposed to stomach acid.
- Black, tarry stools: Digested blood can make stools black and sticky. Certain medicines and supplements can also darken stools, so the appearance needs to be assessed in context.
- Red or maroon blood in stool: This can occur with gastrointestinal bleeding, although the source may be lower in the digestive tract.
- Light-headedness, weakness, or unusual tiredness: These symptoms may occur when blood loss affects the body.
- Shortness of breath, fainting, or a rapid heartbeat: These may accompany significant blood loss or circulatory problems.
- Upper abdominal discomfort, nausea, or vomiting: These symptoms may occur with gastritis, but they do not establish whether bleeding is present.
When Is Gastritis-Related Bleeding an Emergency?
Vomiting blood or passing black, tarry stools requires immediate medical assessment. Do not wait for the symptoms to disappear or assume that bleeding is minor because there is little pain. Gastrointestinal bleeding can progress, and its seriousness cannot be reliably judged from appearance alone.
Seek emergency care immediately if bleeding occurs with fainting, marked dizziness, difficulty breathing, confusion, cold or clammy skin, or pronounced weakness. These can be signs of significant blood loss or shock. Call your local emergency number if the person collapses, loses consciousness, or appears seriously unwell.
The Mayo Clinic advises immediate medical care for vomiting blood, blood in the stool, or black, tarry stools. Emergency evaluation is important even when the cause of the bleeding has not been established.
How Do Doctors Determine Whether Gastritis Is Causing Bleeding?
Healthcare professionals assess the person's symptoms, medical history, medicines, and the timing and pattern of the bleeding. They may ask about NSAIDs, aspirin, blood-thinning medicines, alcohol use, previous ulcers, and known H. pylori infection. These details help guide the investigation, but they cannot independently establish the bleeding source.
Blood and stool tests
Blood tests may help assess the effects of blood loss, including whether anemia is present, and provide information about overall health. Depending on the circumstances, clinicians may also use tests of blood clotting or other measurements relevant to the person's condition. Stool tests can check for blood that is not visible and may help investigate H. pylori infection.
Upper gastrointestinal endoscopy
An upper gastrointestinal endoscopy is a procedure in which a doctor passes a thin, flexible tube with a camera through the mouth to examine the esophagus, stomach, and upper part of the small intestine. It can reveal inflamed tissue, erosions, ulcers, and potential bleeding sites. Small tissue samples may also be taken when needed.
The NIDDK's guidance on diagnosis describes endoscopy, biopsies, blood tests, and stool tests as possible tools for investigating gastritis and related stomach conditions. When active upper digestive tract bleeding is suspected, endoscopy can also help clinicians identify and sometimes treat the source.
How Is Gastritis With Gastrointestinal Bleeding Treated?
Treatment depends on the amount of bleeding, the person's overall condition, and the underlying cause. The immediate priority is to assess and manage blood loss. Once the person is stabilized, healthcare professionals address the source of the bleeding and the stomach-lining damage.
Controlling active bleeding
People with significant bleeding may need hospital care, intravenous fluids, and a blood transfusion when clinically indicated. During an upper gastrointestinal endoscopy, clinicians may use specialized techniques to stop bleeding from an identified site. Additional procedures or surgery may be needed in selected cases if bleeding cannot be controlled using initial methods.
Reducing stomach acid
Medicines that reduce stomach acid, including proton pump inhibitors (PPIs), may be prescribed to help protect damaged tissue and support healing. The choice of medicine and how long it is used depend on the findings, the cause of the injury, and whether active bleeding or ulcers are present.
Treating the underlying cause
If H. pylori infection is responsible, treatment generally combines antibiotics with acid-suppressing medicine and may include other medicines. Follow-up testing may be recommended to confirm that the infection has cleared. If NSAIDs are contributing to the damage, a clinician may review the dose, recommend an alternative, or consider protective treatment.
Do not stop prescribed aspirin, anticoagulants, or other important medicines on your own. These medicines can have important benefits as well as bleeding risks, so decisions about continuing or changing them should be made with the treating clinician. If active bleeding is suspected, seek urgent care rather than trying to manage it with nonprescription remedies.
According to the NIDDK's treatment guidance, management is tailored to the cause of gastritis or gastropathy. Severe stomach bleeding may require treatment during endoscopy, and surgery may be necessary in some cases.
Can Gastritis-Related Bleeding Be Prevented?
Not all bleeding can be prevented, but addressing known causes can reduce the risk of further injury. People with persistent stomach symptoms, a history of ulcers or gastrointestinal bleeding, or a need for regular NSAID use should discuss their medicines and risk factors with a healthcare professional.
Where H. pylori infection is identified, completing the prescribed treatment and following recommendations for confirming eradication can help address an important cause of gastritis and ulcer disease. Limiting alcohol exposure may also be appropriate when alcohol contributes to stomach irritation. People receiving treatment for serious illness may require specific measures based on their clinical risks.
Dietary changes alone cannot reliably stop active gastrointestinal bleeding or treat every cause of gastritis. The most useful preventive approach is to identify the relevant cause, follow an appropriate treatment plan, and seek medical review if symptoms persist or return.
What Should You Remember About Gastritis and Bleeding?
Gastritis does not always cause gastrointestinal bleeding, but damage that produces erosions or ulcers can lead to blood loss. Blood in vomit, coffee-ground-like vomit, and black, tarry stools are important warning signs that need immediate medical assessment. Doctors use the person's clinical history, tests, and often endoscopy to identify the source and decide on treatment. Prompt care can help control bleeding and address the underlying problem.