Accidentally, cheek biting may lead to a sore inside it, and what if it accumulates blood in it after a few hours? Sounds scary, doesn’t it? Don’t fret about it if the roof of your mouth or insides of your cheek has a blood blister on it. They may look intimidating but go away as time proceeds.

Having a blood-filled blister in the mouth is uncomfortable, painful and looks off. The leading reason behind the emergence of this soft tissue is trauma or an accident. But, if the condition is recurrent, it may indicate something else, a more grave issue like an infection. Let’s discuss this in detail.

Mouth Blood Blister

A blood blister is a bumpy round structure that grows in your mouth. These blisters are a result of a vessel situated under the skin-pops, recollects, and clots up under the layer of skin.

Oral Blood Blisters – Causes

  1. Accidental injury or cheek biting
  2. Anxiety
  3. Allergies
  4. Angina bullosa hemorrhagica or ABH
  5. Improper braces
  6. Misfit dentures

Angina bullosa hemorrhagica (ABH)

It is a condition that emerges with a visually dark or purple blood filled blister inside the mouth. They may form at any time and not leave for a few days before finally rupturing. However, the healing procedure is easy, and after bursting, they go away without leaving a scar behind.

Causes of ABH

  1. Nutritional deficiencies such as iron and vitamin B12
  2. Celiac disease
  3. Mouth herpes
  4. Arthritis
  5. Skin rashes
  6. Allergic response
  7. Hormonal fluctuation
  8. Medicines such as NSAIDs or steroids
  9. Toothpaste
  10. Cigarette
  11. Hard food
  12. Local anesthesia
  13. Diabetes
  14. Dental procedures


Managing blood blisters inside the mouth is possible via home remedies. Here are a few tips that might work for you:


Applying an ice cube to the blood blister will help reduce inflammation, swelling and redness. You can also place an ice cube immediately after injury to avoid its formation in the first place.

To ease the pain, place the ice on the spot and put slight pressure if needed to minimize the bleeding. Repeat this a few times until the issue eases off.

Placing Cucumber Slices

Cucumber is known for its healing properties. Cover the mouth blood blister with a slice at least twice or thrice per day until the blister goes away. You can also drink cucumber water for adequate hydration and fast healing.

Witch Hazel Cream

Witch hazel is effective for reducing pain caused because of mouth blisters. It also helps in drying the sores inside the mouth and lowers swelling. Here’s how you can use witch hazel cream on the mouth blood-filled blister:

  1. Soak your cotton swab in the cream and gently put it across the sore.
  2. Do not close your mouth for a few minutes allowing the witch hazel to dry off completely.
  3. Repeat this method more than once a day until the sore gets better.

As good as this remedy is, some people are allergic to it and suffer from a reaction. Therefore check about allergies before using it. Put a small quantity on your non-sensitive area and check for a reaction in the next 24 hours. If nothing happens, then proceed with the blister.

Chamomile Tea For Blood Blister In Mouth

Chamomile is a tasty retreat and an effective solution for lesions forming in the mouth. Its soothing properties help a lot in relieving pain.

Turmeric Powder

You can prepare a balm using powder with honey. Apply this paste 2 to 3 times a day to the mouth sores.

Are Blood Blisters And Mouth Sores the Same Thing?

Oral sores because of fever, or blood-filled blisters, and even canker sores all emerge inside the mouth and visually appear red. They are not exactly the same and have some distinguishing
qualities; here are some of the differences for making things clear:

A canker sore is like a red-colored bubble with a thin white or yellow lining. At the same time, mouth blood blisters are dark blue or purple.

Fever blisters indicate before appearing. The symptoms seen are tingling or itchy sensations. Then, that area rises to form a sore. On the contrary, a blood blister appears randomly in the mouth.


You should immediately seek attention if the lesion is abnormally large, making breathing, swallowing or talking difficult. The blisters appear often but pop in 2 weeks; if they don’t, ask your doctor or dentist to immediately assess the situation. Our dentist in Houston, Texas, at Smile 4ever Dentistry are here for you. Call 281 213 5668 to set up an appointment.

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