Vomiting Blood in Cats: Causes, Symptoms, and Treatment

by beaconpet

Discovering blood in your cat’s vomit, a condition known as hematemesis, is alarming and demands urgent veterinary care. This concerning symptom often signals underlying health issues that necessitate prompt attention. In this comprehensive guide by Beaconpet, delve into the causes, symptoms, diagnosis, and vital treatment options for cats experiencing hematemesis.

Vomiting Blood in Cats: Causes, Symptoms, and Treatment


Gastrointestinal ulcers

Gastrointestinal ulcers can occur in cats due to various factors such as stress, certain medications, bacterial or viral infections, or underlying health conditions. These ulcers can erode the lining of the digestive tract, leading to bleeding and subsequent vomiting of blood.

Rat poison ingestion

If a cat ingests rat poison, it can lead to a clotting disorder known as anticoagulant rodenticide toxicity. This can cause spontaneous bleeding, including bleeding in the gastrointestinal tract, resulting in the vomiting of blood.

Clotting disorders

Certain clotting disorders can lead to spontaneous bleeding in cats. These disorders can be genetic or acquired and can cause blood vessels in the digestive tract to rupture, leading to the presence of blood in vomit.

Inflammatory bowel disease

Inflammatory bowel disease (IBD) is a chronic condition that affects the digestive tract of cats. It is characterized by inflammation, ulceration, and thickening of the intestinal walls. In severe cases, this inflammation can result in bleeding and subsequent vomiting of blood.

Heartworm disease

Heartworm disease is caused by a parasitic infection transmitted through mosquito bites. It primarily affects the heart and lungs of cats. In severe cases, heartworm disease can lead to bleeding, including bleeding in the digestive tract, resulting in the presence of blood in vomit.

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Foreign material in the digestive tract

If a cat ingests foreign objects such as string, hairballs, or bones, it can cause damage to the digestive tract. This damage can result in bleeding and the subsequent vomiting of blood.


The primary symptom of vomiting blood in cats is the presence of blood in vomit. The blood may appear as bright red streaks if it originates from the upper part of the digestive tract. If the blood originates from the lower part of the digestive tract, it may have a coffee ground appearance. Other accompanying symptoms may vary depending on the underlying cause and may include loss of appetite, weight loss, lethargy, diarrhea, or abdominal pain.

Decreased interest in playing in cat


If you suspect that your cat is vomiting blood, it is crucial to seek veterinary attention immediately. The veterinarian will perform a thorough examination to determine the underlying cause of the vomiting. The following diagnostic tests may be conducted:

Physical examination

The veterinarian will examine your cat for any visible signs of illness, such as pale gums or abdominal pain.

Blood tests

Blood tests may be conducted to evaluate the cat’s overall health and check for any abnormalities, including clotting disorders or signs of infection.


X-rays may be taken to assess the condition of the digestive tract and check for any foreign objects that may be causing internal damage.


An ultrasound may be performed to evaluate the structure and function of the organs in the abdomen and identify any abnormalities.


Endoscopy involves the insertion of a thin, flexible tube with a camera into the digestive tract to visually inspect the lining of the esophagus, stomach, and intestines. This procedure can help identify ulcers, tumors, or other abnormalities.


If necessary, the veterinarian may perform a biopsy to obtain a small sample of tissue from the digestive tract for further evaluation.


The treatment for vomiting blood in cats will depend on the underlying cause identified through diagnosis. The primary goal of treatment is to address the cause of the bleeding and provide supportive care. The following treatment options may be considered:

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IV fluids

In cases of severe bleeding, cats may require intravenous fluids to stabilize their condition and maintain hydration.

Blood transfusion

If the cat has experienced significant blood loss, a blood transfusion may be necessary to replace the lost blood and restore normal blood cell levels.


In some cases, endoscopy may be used as a treatment option. During the procedure, the veterinarian can cauterize bleeding ulcers or remove foreign objects causing damage.


Surgical intervention may be required to remove foreign objects or to address underlying conditions such as gastrointestinal ulcers or tumors.

Supportive care

Supportive care may be provided to manage symptoms and promote healing. This may involve medication to control inflammation, pain relief, and a specialized diet to support gastrointestinal health.

Vomiting Blood in Cats: Causes, Symptoms, and Treatment

Gastrointestinal ulcers

Causes of gastrointestinal ulcers

Gastrointestinal ulcers in cats can have various causes, including stress, certain medications, bacterial or viral infections, or underlying health conditions such as kidney disease or cancer.

Symptoms of gastrointestinal ulcers

Symptoms of gastrointestinal ulcers include vomiting, loss of appetite, weight loss, abdominal pain, and black, tarry stools.

Treatment for gastrointestinal ulcers

Treatment for gastrointestinal ulcers may involve the use of medications such as proton pump inhibitors or histamine blockers to reduce stomach acid production and promote healing. Dietary changes to include easily digestible, low-fat food may also be recommended.

Rat poison ingestion

Symptoms of rat poison ingestion

Symptoms of rat poison ingestion may vary depending on the type of poison but can include bruising, bleeding gums, nosebleeds, bloody stool, or vomiting blood.

Treatment for rat poison ingestion

If rat poison ingestion is suspected, immediate veterinary attention is crucial. Treatment may involve inducing vomiting, administering activated charcoal to prevent absorption of the poison, or providing supportive care such as blood transfusions or vitamin K supplementation.

Vomiting Blood in Cats: Causes, Symptoms, and Treatment

Clotting disorders

Causes of clotting disorders

Clotting disorders in cats can be genetic or acquired. Genetic clotting disorders are inherited and can be present from birth. Acquired clotting disorders can be caused by underlying diseases, medication side effects, or certain infections.

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Symptoms of clotting disorders

Symptoms of clotting disorders may include unexplained bleeding, bruising, or the presence of blood in urine, feces, or vomit.

Treatment for clotting disorders

Treatment for clotting disorders will vary depending on the underlying cause. This may involve medication to promote clotting or address the underlying disease or condition contributing to the disorder.

Inflammatory bowel disease

Causes of inflammatory bowel disease

The exact cause of inflammatory bowel disease in cats is unknown, but it is believed to be multifactorial. Factors such as diet, genetics, immune system abnormalities, and bacterial imbalances in the gut may contribute to the development of the condition.

Symptoms of inflammatory bowel disease

Symptoms of inflammatory bowel disease may include chronic diarrhea, vomiting, weight loss, loss of appetite, and abdominal pain.

Treatment for inflammatory bowel disease

Treatment for inflammatory bowel disease may involve dietary modifications, such as hypoallergenic or novel protein diets, medication to reduce inflammation, and antibiotics to manage bacterial imbalances. Additionally, stress reduction techniques may also be recommended.

Vomiting Blood in Cats: Causes, Symptoms, and Treatment

Heartworm disease

Causes of heartworm disease

Heartworm disease is caused by a parasitic infection transmitted through mosquito bites. Cats can become infected if bitten by an infected mosquito carrying heartworm larvae.

Symptoms of heartworm disease

In cats, symptoms of heartworm disease can vary and may include coughing, difficulty breathing, weight loss, lethargy, vomiting, or sudden collapse.

Treatment for heartworm disease

There is no specific treatment for heartworm disease in cats, and management focuses on supportive care to alleviate symptoms. Preventive measures, such as using monthly heartworm preventives, are essential to protect cats from this potentially fatal disease.

Prevention of heartworm disease

Prevention of heartworm disease in cats involves using monthly heartworm preventives. These preventives are available as topical or oral medications and are highly effective in preventing infection if used consistently.

When to Seek Veterinary Attention

If you notice that your cat is vomiting blood or if you suspect any other symptoms related to the causes discussed in this article, it is essential to seek immediate veterinary attention. Contact your veterinarian as soon as possible to schedule an appointment and discuss your concerns. Prompt diagnosis and treatment are crucial for a positive outcome and the overall health and well-being of your cat.

Remember, as a responsible cat owner, your vigilance and commitment to preventive measures can significantly contribute to your cat’s overall health and happiness. Always consult with your veterinarian to develop suitable preventive strategies and maintain routine veterinary check-ups to ensure the early detection and timely treatment of any underlying health issues.

Vomiting Blood in Cats: Causes, Symptoms, and Treatment

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