Causes and Treatments for Blood Blister in Mouth

Have you recently noticed a blood blister in your mouth? Having this problem can be worrying as it may affect the way you chew your food. It can be severely painful, especially when eating warm or hot meals. Fortunately, blood blisters usually disappears within a few days. What are the causes of blood blister in mouth and how to accelerate its healing process?

Blood blister in mouth usually occurs due to cheek-biting or mouth trauma. It forms when the blood vessels are ruptured caused by accidentally biting the skin in mouth while speaking or eating. As blood tries to escape, it accumulates within the epithelial mouth tissue.

Drinking or eating acidic foods, skin infection, problems with dentures may also lead to the appearance of blood blisters. There are also other causes of blood blister in mouth.

Blood Blister in Mouth

Causes of Blood Blister in Mouth

Here are the several causes of blood blisters in your mouth.

1. Canker Sores

Get Rid of Canker Sores on Tongue

Also known as aphthous ulcers, canker sores are shallow lesions that appear at the base of the gums or tissues in the mouth. These sores are not contagious but can make your talking and eating harder due to pain.

Possible causes for the development of canker sores include:

  • Mouthwash or toothpastes that contain sodium lauryl sulfate
  • Minor mouth injury
  • Vitamin B-12, iron or folic acid deficiency
  • Allergic reaction to presence of bacteria in mouth
  • Emotional stress, Hormonal changes
  • Weak immune system or immunodeficiency
  • Ulcerative colitis or Crohn’s disease
  • Excessive consumption of alcohol

Canker sores usually small and can disappear within two weeks. If the sore do not heal on its own and it is unusually large, see a dentist or doctor for proper treatment.

2. Food Allergies

One of the possible causes of blood blister in mouth is food allergy. Food allergies occur when the immune system thinks that a certain food or substance present in the food is harmful to your body. This triggers the immune system to release antibodies to attack the substance. This also results in itchy eyes, diarrhea, dry throat, rashes, difficulty breathing, hives, and anaphylactic shock.

The most common food allergies are triggered by protein content in fish, peanuts, eggs, nuts, wheat, milk, and sea foods. Over-the-counter antihistamines may alleviate the symptoms of allergic reaction from allergens. For severe allergies, seek medical help.

3. Angina BullosaHaemorrhagica


This is a condition characterized by the appearance of blood blisters in the mouth. ABH is caused by a mild trauma to the tissues of the mouth, such as eating hot food. It usually affects the oropharynx or palate.

Other causes of AngineBullosaHaemorrhagica include:

  • Trauma of hot foods
  • Restorative dentistry (crows, fillings)
  • Treatment of gum disease
  • Dental injections, steroid inhalers

The blood blister heals quickly without further discomfort and scarring. However, there are cases that a large bulla does not rupture and may lead to airway obstruction.

4. Nutritional Deficiencies

Nutritional deficiency is one of the most common causes of blood blister in mouth. Lack of vitamins B12 and C can lead to appearance of blisters filled with blood. Other signs of vitamin C deficiency are bleeding gums, red spots on skin, nose bleeds, digestive problems, and gingivitis. You may also experience weight gain, dry hair, weakened immune system, painful joints and easy bruising. Low levels of vitamin C may lead to high blood pressure, certain cancers, gallbladder problem, stroke, and athesclerosis.

The signs and symptoms of Vitamin B12 deficiency include pale skin, tiredness, dizziness, diarrhea and numbness or tingling sensation. You may also experience constipation, heart palpitations, difficulty breathing, and mental problems like memory loss and depression.

5. Thrombocytopenia (Low Platelet Count)


Another possible cause of blood blister in mouth is Thrombocytopenia. Normally, a person has 150,000 to 450,000 platelets per microliter. The body renews the platelet supply regularly by producing new ones in the bone marrow. This condition can be inherited. Other factors that can lower platelet count include:

  • Medications or health conditions
  • Trapped platelets
  • Viral infections like HIV or Hepatitis C
  • Leukemia
  • Anemia
  • Excessive consumption of alcohol

Other signs and symptoms of low platelet count include bleeding gums or nose, blood in stool or urine and easy bruising. You may also experience prolonged bleeding from cuts, heavy menstrual flows, enlarged spleen, and tiredness.

6. Oral Herpes

Oral herpes is an infection that causes painful sores on your tongue, gums, lips, inside the cheeks, and roof of the mouth. It is caused by the herpes simplex virus and can affect people at any age. The infection proceeds to three stages.

  1. Primary infection – During this stage, you may experience oral sores, fever, and other symptoms.
  2. Latency – The virus moves to dorsal root ganglion, a nervous tissue in the spice. The virus reproduces in this location and becomes dormant.
  3. Recurrence – The virus becomes activated again due to emotional or physical stress.

Some signs and symptoms of oral herpes include:

  • Tiredness, irritability, and muscle pain
  • Burning, tingling, or itching sensation
  • Swollen or bleeding gums
  • Swollen neck lymph nodes
  • Painful throat

See a doctor if you are experiencing the symptoms of oral herpes accompanied by decrease in urination, dry mouth, and drowsiness and if you have weak immune system.

7. Hypertension (High Blood Pressure)

High Blood Pressure

Hypertension is also one of the possible causes of blood blister in mouth. This condition occurs when the force of blood against the artery walls is high and may result in heart ailments. A person can have hypertension for years without showing any symptoms. The damages continue and can increase the risk of developing stroke and heart attack.

When symptoms develop, it may include headaches, nosebleeds, and difficulty breathing. Some signs do not occur until hypertension has become severe.

8. Behcet’s Syndrome

Behcet’s Syndrome, also known as Behcet’s disease, is a condition that causes blood vessel inflammation. There is no exact cause of Behcet’s syndrome, but it can be a result of autoimmune disorder. This occurs when the immune system attacks the healthy cells in the body. Some signs and symptoms of this condition include:

  • Painful mouth sores
  • Skin rashes and lesions
  • Eye inflammation (Uveitis)
  • Genital sores
  • Inflammation in arteries and blood vessels.
  • Diarrhea, abdominal pain
  • Headache, fever, disorientation, stroke

If you think that you are experiencing the symptoms of Behcet’s syndrome, visit a professional for proper diagnosis and immediate treatment.

Treatments for Blood Blister in Mouth

Blood blisters can be treated with over-the-counter painkillers to reduce discomfort and infection. Do not squeeze the blister and see a doctor for antibacterial and antiviral medications. If the blister is caused by vitamin deficiency, you can take supplements or include foods rich in vitamin B12 and C in your diet.

You can also try home treatments for blood blister in mouth.

1. Apply Ice

Rice Powder

You can apply ice cube to the blood blister to reduce internal bleeding and swelling. The cold temperature of ice can constrict the blood vessels. Simply wrap an ice cube in a thin towel or plastic bag. Apply it on the blister for ten minutes. Take a break before reapplying. Repeat this treatment until the blister is gone.

2. Cucumber Slices

cucumber for teeth pain

The silica content in cucumbers can strengthen the tissues in the skin. Cut a cucumber into slices and put it in the refrigerator. Apply the chilled cucumber slice on the blood blister for five minutes. Repeat this treatment as needed to speed up the healing process.

3. Aloe Vera Gel

Health Benefits of Aloe Vera Gel

Another natural treatment for blood blister in mouth is aloe vera. It contains anti-inflammatory and cooling properties that can alleviate discomfort. Simply cut an aloe vera leaf and extract its gel. Apply it on the blister.

4. Witch Hazel

Witch Hazel

Witch hazel has astringent tannis that can lessen discomfort. It can also alleviate inflammation and heal the blister faster. Simply apply enough amount of witch hazel on the blister and let it dry. Repeat this treatment four times daily to get rid of blood blister in mouth.

5. Turmeric Powder

Turmeric Powder Pink Eye

Turmeric contains medicinal, therapeutic, and antiseptic properties that can treat various skin problems, including minor cuts, burns, and blood blisters. Mix turmeric powder with honey or rose water to make a paste. Apply this on your blood blister three times a day.

6. Epsom Salt

Use of Epsom Salt

Another effective remedy for blood blister in mouth is Epsom salt. It lessens inflammation and pain caused by the blister and it can make it pop naturally. Simply add one-half teaspoon of Epsom salt in a glass of water. Use this solution to rinse your mouth. Repeat this three times a day to accelerate the healing process.

7. Tea Tree Oil

Tea Tree Oil

Tea tree oil contains anti-inflammatory, antiseptic, and antifungal properties that can dry out the blood blister naturally. To use this remedy for treating blood blister, dilute tea tree oil with water. Apply it on the blister and leave it on for ten minutes. Rinse your mouth with lukewarm water. Repeat this treatment two or three times a day.

8. Garlic Oil

Garlic Oil

Garlic contains components that can accelerate the healing process of the skin while preventing infection. Massage this oil on the blister and let it sit for thirty minutes. Rinse your mouth thoroughly with lukewarm water. Repeat this treatment a few times a day until the blister is gone.

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