Blood Blister in Mouth

Blood Blister in Mouth and Cheek Causes, Pictures, Possible Treatments

Blood blister in the mouth can occur to anyone. They typically occur when the outer layer of the skin is damaged. The presence of blood blisters in the mouth can be a source of discomfort, a symptom of underlying health condition and the possible cause of mouth ulcers as well as an infection.

However, blood blisters in the mouth disappear on their own without any form of treatment. You will notice the appearance of blood blisters on the roof of the mouth, inside cheeks, side of gums and even on the side of the tongue.

In this post, you will learn some of the various causes and factors that lead to the formation of blood blisters in your mouth. You will also understand some measures that can help in preventing the occurrence of blood-filled blisters in the mouth.

Difference between Blood Blister and Other Mouth Sores

Cold sores, canker sores, and blood blisters do appear in the mouth. All of them are usually red in colour. However, they do have some differences since they are caused by different factors. Some of the common differences include:

  • Canker sores

According to doctors on WebMD, canker sores usually start as reddish ulcers instead of the dark red to the purple colouring of a blood blister. They are also covered by a whitish or yellowish film.

  • Fever blisters

According to doctors on the Mayo clinic, fever blisters are also known as cold sores. They usually start as a tingling feeling where the blister will form. On the other hand, blood blister may appear suddenly without warning.

Fever blister may also be accompanied by swollen lymph nodes and fever. They also appear on the lips and inside the nose. Always avoid popping your cold sores without consulting your doctor.

What Causes Blood Blister In The Mouth?

Knowing the cause of the blood blisters in your mouth will help to treat and speed the healing process. Here are some of the possible causes of blood blisters in the mouth. The causes include:

Mouth injury

Mouth trauma or injury is the main cause of blood blisters in your mouth. Mouth tissues are delicate and therefore, they can easily be injured by poor-fitting dentures, accidental biting of cheeks or being scraped by jagged teeth.

According to Dr David Murchison on Dental Surgery, mouth blisters that are caused by injury mainly occur on the inside of the cheeks. You will experience painful sores in the mouth once these blood blisters burst.

Chronic cheek biting is another reason for the formation of blood blisters in your mouth. This condition is known as morsicatio buccarum. This condition is mainly caused by stress. It usually results in mouth lesions.

Blood blister in the mouth due to cancer

Those types of blood blisters in the mouth that are persistent might be a sign of mouth cancer. According to the Victoria State Government, having mouth blood blisters that won’t go away or mouth ulcers that bleed require investigation in order to rule out the possibility of cancer.

According to doctors on WebMD, some of the common symptoms of oral cancer are difficulty in moving the jaw or tongue, speech changes, or an altered taste in the mouth. Always consult your doctor for examination and diagnosis.

Blood blisters in the mouth due to low platelets

Having low platelets count in the blood can result in an immune disorder that causes blood blisters in the mouth. This can increase the chance of getting bruises or bleeding in the mouth.

According to doctors on WebMD, there are certain autoimmune conditions that cause the destruction of platelets in the blood. This type of autoimmune condition can result in blood blisters in the mouth and another part of the skin.

Blood blister in mouth after eating

There are certain types of food that can lead to the formation of blisters on the roof of the mouth. Most of these foods contain acidic content.

Spicy foods and foods that contain more salt can result in mouth ulcers as well as blood blisters due to an allergic reaction.

Teething blisters (in babies)

Most babies when teething usually experience blisters on the gums. Generally, new teeth can result in little bleeding under the gums. This later causes red coloured bumps around the gums.

According to medical reports on Parenting and Child Health, the blood blisters usually disappear after teething. It is not advisable to prick the blisters since it can result in a secondary infection.

It is advisable to see your doctor in case there are no teeth coming out. This could be a sign of a more serious health condition.

Certain medications

There are certain medications when used could result in some side effects. Some of the common side effects are oral blood blisters or mouth sores and ulcers.

According to doctors on WebMD, some of the common medications that cause blood blisters in the mouth are penicillin, arthritis, and anti-inflammatory drugs.


Diabetes can result in a lot of complications in the body. You may experience blood blisters in your mouth due to diabetes. According to doctors on mayo clinic, diabetes increases the chance of infections on the skin, gums, and nerves.

According to medical reports by the American Diabetes Association, oral infections are quite common to patients suffering from diabetes. Some of the common symptoms are red patches on the roof of the mouth, cheeks, and gums.


According to doctors on WebMD, excessive smoking can result in oral health problems such as mouth cancer, lung cancer, and gum disease. It is advisable to quit smoking in order to reduce the chances of oral infection.

According to a medical report in the journal Nicotine & Tobacco Research, mouth ulcers are some of the common symptoms of smoking. However, oral lesions usually last for some weeks then it disappears.

Oral herpes

The presence of painful red blisters on the roof of the mouth, inside of cheeks, lips and gums could be due to herpes simplex virus-1 (HSV-1). This is common among people who have a weak immune system since people with a strong immune system do not show any symptom of herpes simplex virus-1.

According to Dr Charles Patrick Davis on eMedicineHealth, a blister can appear in clusters or random on the roof of the mouth. These painful sores can be accompanied by fever, fatigue, and muscle aches.

Nutritional deficiencies

You are likely to experience blisters filled with red fluid in the mouth due to nutritional or vitamin deficiencies.

According to Dr David Murchison on WebMD, insufficient vitamin B, iron and vitamin C in the body can lead to painful mouth ulcers or sores.

Other Causes

They include:

  • Bullous pemphigoid

This is a condition that occurs due to a problem with the immune system which results in large reddish blisters in the mouth. These types of blisters occur suddenly without warning.

According to doctors from the Mayo Clinic, the condition is mainly known to affect the skin. This condition can also result in blisters or sores in the mouth. Blistering get worse due to ageing and it is common for people of age 60 years.

  • Angina Bullosa Hemorrhagic

This condition can result in large blood and fluid-filled blisters in the mouth. According to Dr Mark Duffill on DermNetNZ, factors that trigger largely filled blisters in the mouth due to angina bullosa Hemorrhagica are trauma, diabetes, or hereditary.

According to a medical report in the Indian Journal of Dermatology, blood-filled blisters caused by angina bullosa hemorrhagic mainly occur on the roof of the mouth. These blisters can also occur on or under the tongue.

  • Celiac disease

This is an oral disease that leads to the formation of sores and ulcers around the lips as well as the roof of the mouth. This disease is known to affect how the body absorbs certain nutrients and minerals. It may also trigger an inflammatory reaction to gluten.

According to the Journal of the Canadian Dental Association, celiac disease is said to cause oral blisters and enamel defects. Therefore, recurring blisters in the mouth are linked to celiac disease.

Painless Blood Blister in Mouth

Accidental cheek bite by the teeth is the main cause of painless blood blisters in the mouth. Cheek biting causes the outer layer of skin to rapture and traps blood. This is the reason for the formation of a painless lump in the roof or inside the mouth.

Newly formed blisters are likely to cause pain and itching sensation. It is advisable not to pop the blisters since it will form a channel for secondary infection. The blood and the fluid will dry off making the lump to be painless.

The lump left behind is usually dark coloured and tender when touched. You can pop painless blister using a sterilized needle and hands washed with an antiseptic gel. Lance the blister and squeeze of its contents. You can also sterilize the open wound to avoid infection.

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Sudden Blood Blister in Mouth

Sudden blood blisters can occur on any part of the mouth without any reason. This should not make you panic and get worried. The most places are the roof of the mouth, inside the cheek or inside the lips. You should visit you, the doctor, in case they are large and painful.

According to medical studies, most blood-filled blisters usually heal on their own without any form of treatment. In case the blisters do not heal on time, it could be due to a virus attack (oral herpes), oral cancer or an allergic reaction.

It is advisable to consult your doctor to carry out the test in order to treat the underlying health conditions. Your doctor will test and diagnose the underlying cause.

Blood Blister in Mouth Cheek Pictures

The size and the degree of redness vary depending on the location of blood blisters. The appearance of the blisters inside your mouth and cheeks will give a hint on what causes them. The pictures in the article will show the various places in the mouth where blood blisters occur.

Recurring Blood Blister in Mouth

You should not panic and get worried due to the occurrence of blood blisters in your mouth since it is considered to be normal. According to research, recurring blisters in your mouth is not associated with oral cancer or HIV/AIDS infection. It is usually due to herpes simplex virus HSV.

These types of blisters usually last for a period of between 2-3 weeks. Herpes simplex virus usually remains in the body dormant despite the healing of the blisters.

Some of the factors that trigger a reoccurrence of blood blisters in the mouth due to herpes simplex virus are high body temperatures, general body fatigue, the monthly period for female and a weak immune system.

It is important to note that herpes simplex viruses are highly contagious. It is therefore advisable to avoid sharing towels, razors and at times utensils (spoon).

How to Get Rid Of Blood Blister in Mouth

You can either use medical treatment or home remedies to get rid of blood blisters in your mouth. This usually depends on the cause since mild causes are treated using home remedies while severe causes using over the counter drugs.

Home Remedies

They include:

Ice Pack

This will help to constrict blood vessels in the affected area hence reducing swelling and bleeding. You can, therefore, take some ice cubes in a clean cloth and place on the blister after every ten minutes. Repeat the process twice per day until the symptoms disappear.


It has a soothing effect that helps to control many skin problems. It also contains silica that strengthens connective tissues in the skin. The cooling effect helps to ease pain and inflammation caused by blisters on the roof of the mouth.

Place a thick slice of chilled cucumber on the blister. Keep it on for a few minutes. You can do this around four times daily.

Aloe Vera

It helps to ease pain and inflammation inside the cheek and mouth due to blood blisters. Take some fresh Aloe Vera gel and apply it to the affected area. Repeat this 4-5 times a day, until it heals.


It has antimicrobial properties that help to treat various skin problems. Obtain a paste of turmeric mixed with honey or water. Apply this paste on the blood blisters. Rinse the area with warm water after 15 minutes. You can do this twice or thrice a day.


It helps to speed the healing process and the formation of new skin cells. It also has anti-inflammatory properties. You can prepare a paste of sandalwood powder and rosewater then apply on the blisters. Allow them to dry up then wash with water.

Epsom Salt

It helps to boost the healing process and reduction of pain since it has magnesium and sulfate. Prepare a saline solution with warm water and rinse your mouth. This will help also to get rid of germs causing infection.


It has astringent properties that help to foster the healing process as well as the prevention of infections on the wounds. Simply put 2-3 teaspoons of chamomile in hot water. Soak some cotton in the tea after it cools down and gently place on the blisters.

Medical Treatment

Generally, oral blisters are known to be harmless and mild. They do disappear without treatment. If the blisters are recurrent always visit your doctor for checkup and treatment.

Your doctor may sometimes recommend the use of medicated mouthwashes, ulcers gel and kinds of toothpaste to help get rid of the blister in your mouth.

Some of the other prevention tips recommended by doctors include:

  • Avoid spicy foods
  • Remove dentures until the sore heals
  • See a dentist for new dentures if that is the cause
  • Avoid popping the blister
  • Choose soft foods while the blister is healing


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