Blood Blister on Feet, Finger, in Mouth, Pictures and Home Remedies

The formation of a blood blister occurs due to damaged blood vessels and subcutaneous tissues of the skin that has no cuts. To avoid further damage, there will be a build-up of a clear fluid or blood, which is trapped in the uppermost layer of the skin. In some occasions, the fluid may also contain pus.

Normally, this type of skin problem can naturally heal since the skin can reabsorb the fluids. However, if the blister is large and painful, pricking it is imperative. If not punctured, the fluids will dry up and leave a putty-like substance consisting of dead cells, which may take longer to remove. So, what are the common causes of blood blisters?

Causes of Blood Blister on Feet


In most cases, a foot blister develops due to the activities a person does. However, other factors may cause this condition.

  • Intense Friction

A sudden and intense friction is the most common cause of a foot blister. Various factors can cause this. It can be due to a new pair of shoes or poorly fitted shoes. It can also develop when a person does long distance running or walking. When there is a warm temperature, the feet may sweat more causing a warm and moist skin, which increases the risk of developing blisters.

  • Intense Heat

Exposure to a very hot temperature may cause the skin to develop blisters. During a first-degree burn, it may form after a few days as part of the healing process. For second-degree burns, it will immediately appear. In some cases of sunburns, especially during prolonged exposure to UV rays, painful blisters may also develop.

  • Cold Temperature

When there is a freezing temperature, the blood vessels will contract to push the blood away from the extremities in an attempt to keep the body warm. Foot Blisters develop during second-degree frostbites.

  • Chemicals

Exposure to strong and harmful chemicals can cause skin irritation and blisters. For this reason, always be careful and protect yourself when using chemical substances.

Causes of Blood Blister on Finger


Like the feet, we always use our hands and fingers, which may lead to injuries and blisters. In some cases, a medical condition can also cause blisters.

  • Injury

Burns and exposure to harmful chemicals are some of the causes of injuries in the hand and fingers, which may lead to the formation of blisters.

  • Fungal Infection

A fungus, known as the Tinea manuum, is the common cause of fungal infection in the hands. It can cause symptoms such as a burning sensation, itchiness, and presence of a blood blister.

  • Viral Infection

Numerous viruses can cause blisters. Varicella zoster is the causative agent of chickenpox and shingles. Herpes simplex virus causes herpes. All these medical conditions are contagious. In these cases, it is imperative to treat the disease before the blister starts to heal.

  • Impetigo

Impetigo is another medical condition that causes blisters and sores. Other symptoms may include fever, inflamed lymph nodes, and itchiness. Although this condition may go away without treatment, you still have to consult your doctor since its symptoms are similar to serious conditions such as cellulitis.

  • Eczema

Pompholyx, a type of eczema, causes the formation of tiny blisters in the hands and fingers. Other symptoms may include itchiness and a burning sensation in the affected area. It can occur in everyone, but it is commonly observed in people aging 40 years old and above. Creams containing steroids can help reduce the irritation and swelling.

Causes of Blood Blister in Mouth


Blood blisters in the mouth can be painful and may affect your ability to chew your food. Numerous factors can cause this.

  • Mouth Ulcer

The two types of mouth ulcer are cold sores and canker sores caused by a drug’s side effect. The formation of blood blisters will more likely occur in canker sores since it can bleed inside the mouth.

  • Herpes

Oral herpes is an infection caused by the herpes simplex virus. In this condition, the painful blood blisters are present in all parts of the oral cavity including the lips. Other symptoms may include fatigue, muscle aches, and fever.

  • Angina Bullosa Hemorrhagica

A blister filled with blood located underneath the tongue or on the cheek is a condition known as angina bullossa hemorrhagica. This blister will suddenly break open leading to bleeding or an open wound. The good news, it can heal without any treatment.

  • Nutrient Deficiency

A deficiency in either vitamin C or B12 can trigger the development of blisters in the mouth.

  • Allergies

Allergies can cause blisters. An allergic reaction may occur due to several reasons. It can be because you are allergic to a certain food or medication.

  • Excessive Alcohol Drinking

Frequently drinking high amounts of alcoholic drinks can cause mouth ulcers, which can lead to blisters.

Home Remedies for Blood Blister

Most blood blisters will heal naturally. However, if you want to hasten the healing process, you can use various home remedies.

  • Garlic Oil

Once a blister pops or breaks, microorganisms may contaminate the affected area. Garlic oil has antibiotic properties, which reduces the risk of infection.

To use this oil, you can heat it and allow it to cool. Apply a few drops of oil to the affected area. Once the oil is absorbed, you can rinse the area with water.

  • Ginger

Ginger is popular for its effectiveness in reducing inflammation. To use ginger, extract its juice and apply it to the affected area. You can apply this remedy multiple times every day.

  • Turmeric

Turmeric has disinfectant and anti-inflammatory properties. Thus, this natural product can reduce the risk of infection and swelling. To use powdered turmeric, you can make a paste by combining it with honey. Apply the mixture to the affected area. Once the mixture is dry, you can rinse it with water. You can do this remedy three to four times every day.

  • Witch hazel

Witch hazel is a potent astringent that can hasten the healing process due to its tannins. It also contains anti-inflammatory compounds such as flavonoids and resins, which helps reduce swelling.

  • Tea Tree Oil

Tea tree oil has antimicrobial properties due to its terpinen-4-ol. This oil is an effective remedy for blood blisters caused by fungus. To use this oil, you have to dilute a few drops with sterile or warm water. You can apply the mixture for about 15 to 20 minutes and rinse. You can do this procedure twice a day.

  • Epsom Salt

Epsom salt can help dry the blisters. Its magnesium and sulfate contents can help reduce pain. To use this remedy, the first step is to create a paste by mixing Epsom salt in a few drops of warm water. Apply the paste to the affected area for about 15 to 20 minutes and rinse. You can do this procedure two to three times every day.