Dog Vomiting Blood – Symptoms, Causes and Diagnosis

Reading Time: 5 minutes

Dogs vomiting blood (properly called ‘hematemesis’) is a non-specific sign that can suggest several underlying issues. The amount and appearance of blood can help to determine whether the problem is severe or not, but cases should always be evaluated by a veterinarian.


Mild to moderate to severe

Table of Content

Key points

  • Bloody vomit can be due to a variety of causes ranging from mild to severe
  • The amount of blood and the presence of other symptoms help to decide how severe the problem is
  • Exposure to toxins, the presence of a foreign object in the stomach, and cancers are all serious causes of dogs vomiting blood
  • Dogs vomiting blood should always be evaluated by a vet to ensure the cause isn’t life-threatening, after which home treatment may be possible.

Common in:

Common in any age group, gender, and breed.

Symptoms and types:

Even the ‘mild’ cases caused by stomach inflammation do need medical intervention to help dog settle down.

Understanding the diagnostics

Learning about the causes


Injury to the esophagus, stomach, and guts


Coagulation problems

Respiratory blood

Best treatment options

Home remedies and their effectiveness

You shouldn’t try to treat a dog throwing up blood at home, as many causes can be life-threatening.

If your dog has started vomiting blood, it’s best to see a vet. Even the ‘mild’ cases caused by stomach inflammation do need medical intervention to help them settle down. Many causes are more severe and some can be life-threatening, so it’s best to let your vet make that assessment.

However, simple home care when your dog first starts vomiting can prevent them progressing to throwing up blood. Removing food for several hours allows the stomach to settle. You should then re-introduce small amounts of a bland diet little and often so as not to overwhelm your dog’s stomach. This may be enough to stop your dog from vomiting, but if it’s ineffective it’s still recommended to see a vet.

When to see a vet


After graduating from the University of Nottingham, Jo went on to work in companion animal practice in the UK. After spending time in an orthopaedic referral hospital, a feline only practice, and a general practice with out-of-hours, she moved to working as a locum relief vet in order to spend more time writing. She lives in the Channel Islands with her partner Ian and their badly behaved terrier, Pixie.

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