Other health problems

My Dog Is Bleeding From Their Mouth

María Besteiros
By María Besteiros, Expert veterinary assistant and canine/feline hairdresser.. September 5, 2021
My Dog Is Bleeding From Their Mouth

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When we see blood coming from our dog's mouth, it is understandable we fear for their well-being. Blood around a dog's mouth may be due to oral health problems, but we also need to consider the fact the mouth is the beginning of the digestive tract. It is possible blood is emanating from the gastrointestinal system. When this is the case, it implies a serious health problem which requires immediate treatment. To understand why a dog is bleeding from their mouth, we need to look at the context. This includes the color, amount and consistency of the blood.

At AnimalWised, we look at the reasons why my dog is bleeding from the mouth. We understand the possible causes and treatment of this problem to best ensure your dog's overall health.

You may also be interested in: My Is Dog Bleeding From Their Anus
  1. Dog bleeding from the mouth overview
  2. Oral health problems
  3. Respiratory system problems
  4. Gastrointestinal problems
  5. Other causes of internal bleeding in dogs
  6. My old dog is bleeding from the mouth

Dog bleeding from the mouth overview

When we see blood in or around our dog's mouth, we should know there are various underlying causes. To help us better understand what these may be, we need to make a key distinction. We need to determine whether the blood is fresh or old. Fresh blood from your dog's mouth will be bright red. This implies the blood is coming from either the mouth itself or from the upper part of their digestive tract.

Blood which is dark in color is old blood. This implies it comes from lower in the digestive system and may even be partially digested. Both are worrying, but the reasons for the blood will differ and treatment is often more complicated if the issue is lower in the gastrointestinal system.

Another important factor is whether the bleeding is acute or chronic. Small oral health problems may cause minor bleeding which resolves itself after a short period. Chronic bleeding means there is a more serious issue affecting their organism. We need to observe for concurrent symptoms such as lethargy, paleness in the dog's mucus membranes, breathing difficulties, problems eating and other signs. These will need to be related to the veterinarian to help achieve a correct diagnosis. Severe chronic bleeding is life-threatening and may require intensive treatment.

Below we look at the most common reasons why my dog's mouth is bleeding in more detail.

Oral health problems

One of the most common reasons why a dog's mouth is bleeding is due to oral health problems. Dogs are inquisitive by nature and use their mouths to interact with their environment. It is common for them to bite or chew foreign objects, even if they have no intention to ingest them. For example, dogs often chew on sticks or other hard objects which can shatter. Pieces of these objects can pierce their gums and cause minor temporary bleeding.

Small cuts and wounds in a dog's mouth will cause fresh blood to appear. The mucus membranes of the dog's gums usually heal relatively quickly. However, we should look in their mouths to observe for the wound and gauge its severity. Abscesses and broken teeth can also result in bleeding.

Blood can also appear in a dog's mouth due to dental and gum disease. This is especially the case if the dog is bleeding from their gums. We may be able to observe an excess of plaque or tartar, halitosis, receding gums or even pain when chewing. If a dog has severe periodontal disease, the pain can be intense and make eating difficult. This is especially the case if they have hard dry kibble.

In puppies, it is possible to see a little blood when they lose their baby teeth. Otherwise, bleeding due to dental problems will need veterinary assistance. Once the initial issue is addressed, we will need to ensure we help maintain their dental hygiene.

My Dog Is Bleeding From Their Mouth - Oral health problems

Respiratory system problems

Although we may see blood in the dog's mouth, it is possible the blood is coming from somewhere else. Since the respiratory tract is connected to the throat and mouth, it is possible blood is coming from the lungs, throat or any part of the anatomy connected to the respiratory system.

Respiratory problems which can cause bleeding from the mouth include:

  • Bacterial infections
  • Viral infections (e.g. canine distemper)
  • Tumors
  • Polyps
  • Cold/flu

When the dog coughs and gags or sneezes for a prolonged period of time, these symptoms may result in bleeding from the respiratory tract. This bleeding will stop when the underlying problem is treated.

Even if the bleeding is minimal, it is important we take them to a veterinarian. There are some serious infections and medical problems which can have minimal symptoms, but still pose a serious threat to the health of the dog. Correct diagnosis and proper treatment are required.

Gastrointestinal problems

As stated above, old blood usually implies there is a problem further down in the gastrointestinal system. This is usually because the blood comes from the mouth in the form of vomit or regurgitation. It is possible bleeding in the stomach will be vomited out quickly, meaning the blood will appear fresh. However, gastric acid will start to digest the blood after only a short time, resulting in the appearance of old blood.

When a dog has internal bleeding in the gastrointestinal system it is possible they will regurgitate blood through the mouth. However, it is much more common for the blood to exit through the anus since the digestive flow is directed in this way. When the dog is bleeding from the mouth and anus simultaneously, it implies a very serious medical problem.

The causes of bleeding from the mouth in dogs due to gastrointestinal problems include:

  • Gastritis: gastritis in dogs is the term for inflammation of the gastrointestinal mucosa. The causes are varied, but it can often result in internal bleeding. Intoxication is a common problem as dogs often eat things they shouldn't. This could be due to eating inorganic material or being poisoned by a certain substance.
  • Infections: infections can also cause gastritis, but they are incredibly varied and have different symptoms. Viral, bacterial and fungal infections can result in internal bleeding.
  • Parasites: internal parasites can affect the health of the dog to the point they bleed internally. This can be due to the physical action of the parasites or if they compromise the immunity and lead to secondary health problems.
  • Ulcers: gastrointestinal ulcers are a common cause of blood coming from the dog's gastrointestinal system. This will happen if they rupture which can be life threatening.
  • Medication side-effects: one cause of ulcers in dogs is the result of taking medication. Certain medications are harsh on the dog's digestive system and can rupture its mucosa. Some medications require additional medications to be taken in order to prevent these secondary problems.
  • Cancer: tumors in the gastrointestinal system can result in internal wounds, usually causing bleeding from the mouth and anus at the same time.

When we see gastrointestinal problems, there are many other symptoms we need to look out for. The dog may vomit white foam with specks of blood in it, something which can help a veterinarian determine the correct diagnosis. Similarly, if the dog is bleeding from the nose, this will point to a different health problem.

Other causes of internal bleeding in dogs

There are other causes that can explain why a dog has blood in their mouth. When a dog suffers a trauma, it can lead to oral bleeding. Whether falling from height or being involved in a vehicular collision, the problem may be serious and internal. If we do not witness the trauma, we may not know something is wrong until the bleeding occurs. If we suspect such trauma, we need to take them to a veterinarian immediately.

Coagulopathies, i.e diseases that affect blood clotting, can also cause observable bleeding in the mouth, nose, anus, etc. They require urgent veterinary treatment.

My Dog Is Bleeding From Their Mouth - Other causes of internal bleeding in dogs

My old dog is bleeding from the mouth

A dog is considered elderly or senior after around 7 years of age. However, this will depend on the individual circumstances of each dog. As a dog ages, their body will have suffered general wear and tear. Not only are they often physically degraded, but their immune system can deteriorate more easily. For this reason, when an old dog is bleeding form their mouth, it is important they are taken to a veterinarian for a checkup.

Prevention is always better than treatment. As your dog ages, you should take them for more regular checkups, ensure their vaccination and deworming schedules are up to date and provide the right levels of rest and exercise. Diet is also important as it will help to strengthen their immune system and a dog's dietary needs change as they age. Ensuring these needs are met can help avoid the causes of bleeding from the mouth.

Take a look at our complete senior dog care guide for more information.

This article is purely informative. AnimalWised does not have the authority to prescribe any veterinary treatment or create a diagnosis. We invite you to take your pet to the veterinarian if they are suffering from any condition or pain.

If you want to read similar articles to My Dog Is Bleeding From Their Mouth, we recommend you visit our Other health problems category.

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My Dog Is Bleeding From Their Mouth