Hematemesis (Vomiting Blood) in Cats


Overview of Feline Hematemesis (Vomiting Blood) 

Hematemesis is the act of vomiting blood. Hematemesis may involve the vomition of new or recent blood, which is bright red. It can also involve the vomition of old, partially digested blood, which has the appearance of brown coffee grounds. There are a variety of causes of vomiting blood in cats and the effects on the cat are also variable. Some are subtle and minor ailments, while others are severe or life threatening.

General Causes of Vomiting Blood in Cats

  • Clotting disorders (coagulopathies) that cause bleeding into the gastrointestinal tract
  • Gastrointestinal tract ulcerations, primarily of the stomach, esophagus or upper small intestine (duodenum)
  • Bleeding tumors of the stomach, esophagus and upper small intestine
  • Bleeding in the stomach or esophagus from the presence of foreign bodies
  • Administration of medications that are irritating to the stomach
  • Ingestion of foreign material or bones that lacerate the lining of the esophagus or stomach
  • Vomiting blood that has been swallowed, such as from bleeding in the mouth, from a nose bleed (epistaxis), from blood that was coughed up from the lungs (hemopytsis), or licked from the skin

    What to Watch For

  • Blood in the vomitus. Fresh blood is usually bright red. Old, partially digested blood is brown and has the appearance of coffee grounds.
  • Anorexia
  • Diarrhea
  • Digested, dark black blood in the feces (melena)
  • Fresh, red blood in the feces (hematochezia)
  • Possibly abdominal pain
  • Paleness or pallor of the gums with severe blood loss
  • Rapid breathing with severe blood loss
  • Weakness, collapse, and shock with severe blood loss
  • Signs of bleeding at other sites in or on the body
  • Diagnostic Tests for Cats that Vomit Blood

  • Complete blood count (CBC)
  • Biochemical profile
  • Urinalysis
  • Coagulation (clotting) profile
  • Abdominal and chest (thoracic) X-rays or radiographs
  • Abdominal ultrasonography
  • Upper gastrointestinal contrast study
  • Endoscopy of the esophagus, stomach and small intestinal tract
  • Examination of other sites of bleeding, such as examination of the mouth, chest x-rays, x-rays and scooping of the nose, etc.
  • Treatment for Vomiting Blood in Cats

    The vomiting of blood that represents bleeding within the gastrointestinal tract is a serious condition. It generally warrants hospitalization, the performance of numerous diagnostic tests, and at the very least, supportive care. Symptomatic therapy in cats may include the following:

  • No food or drink given by mouth (NPO)
  • Intravenous fluid and electrolyte therapy
  • Blood transfusions as needed
  • Gastric acid blocking agents and gastric protectant drugs to treat for gastrointestinal ulceration while awaiting test results
  • Determining the underlying cause and instituting specific treatments for the cause
  • Home Care

    Call your veterinarian immediately if there is blood present in the vomitus, and administer all medications and dietary changes as directed by your veterinarian. Avoid drugs that might damage the gastrointestinal tract, such as corticosteroids and aspirin.


    Information In-depth on Hematemesis in Cats

    Hematemesis is the presence of flakes, streaks or clots of fresh blood in the vomitus, or the presence of digested blood in the vomitus. Digested blood is often described as looking like coffee grounds. Hematemesis may be the only clinical sign, or it may be accompanied by other clinical signs. It is sometimes difficult for the pet owner to distinguish between true hematemesis, which involves bleeding within the gastrointestinal tract, from secondary hematemesis, which involves the vomiting of swallowed blood. Sneezing or coughing blood, and/or blood dripping from the mouth are signs of bleeding that may be swallowed into the stomach, and then secondarily vomited. A careful history and thorough physical examination will help distinguish between them.

    True hematemesis usually indicates a serious underlying disease, and generally warrants hospitalization, extensive diagnostic testing, and supportive care. It is best to determine the underlying cause, and treat the specific problem, rather than attempting only symptomatic therapy.

    Causes of Hematemesis (Vomiting Blood) in Cats

    There are many potential causes for hematemesis. The most common causes are usually diseases or disorders of the upper gastrointestinal tract, although in some cases, clotting disorders (coagulopathies) may result in bleeding even though the gastrointestinal tract is essentially healthy.

  • Coagulopathies or bleeding disorders should be considered, especially if there is evidence of bleeding from other body sites as well. Bleeding disorders are uncommon in the cat, but may arise with exposure to warfarin rodenticides, or the ingestion of rodents poisoned by these agents.
  • Gastrointestinal ulcerations or erosions are one of the more common causes of hematemesis. These ulcers can occur with many different disorders, such as:
  • Gastrointestinal foreign bodies (especially in hunting cats who eat bones) or tumors of the esophagus, stomach, upper small intestine
  • Infiltrative diseases of the wall of the stomach or upper intestines, such as inflammatory bowel disease
  • Chronic inflammation of the esophagus, especially with regurgitation of acidic stomach contents
  • Chronic inflammation and infection of the stomach
  • Metabolic diseases, such as kidney failure and chronic liver disease
  • Administration of drugs that affect the lining of the stomach, including aspirin and corticosteroids
  • Perioperative hemorrhage (bleeding associated with surgical procedures) following surgery on the stomach or intestines
  • Overproduction of stomach acid due to certain tumors (rare in the cat)
  • Heavy metal intoxication with arsenic, lead and zinc (uncommon causes of hematemesis)
  • Following septic shock (shock due to an overwhelming bacterial infection)
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