What Causes Blood Blisters

A blood blister occurs when the blood, lymph and other body fluids are trapped inside the external layer of the skin. This type of blister forms when subdermal tissues and blood vessels are damaged without piercing the skin.

When these blisters erupt, they usually release fluid that has the same color that you see inside the skin. Blood blisters can be red, dark red or dark blue. Sometimes the fluids are cut off from the rest if the body and dry up, leaving behind dead cell material inside the blister with a texture like putty. Some blood blisters can be extremely painful due to bruising where the blister occurred.

Blood blisters can be caused due to injury that causes pressure and heat in the form of a blister. If the trauma causes the blood vessels to rupture or get damaged, the pool of blood that forms underneath the main surface of the skin is what makes the blister a blood blister. Blood blisters usually develop because of a sudden intense force such as hard pinching of the skin rather than gradual application of friction that causes ordinary blisters. Blood blisters may also develop from getting scalded or burned, including getting sunburn. It may also result as the skin’s reaction to allergens, chemical irritants, fungal skin infections, and viral skin infections.

Blood blister often occurs in the mouth and on the lip because body parts that have high supply in blood are highly susceptible to it. Many times, blood blisters also appear in the feet. This is due to wearing of ill-fitting shoes or standing or walking for a long period of time.

Treating of blood blisters varies. Most of the time they just disappear on their own, thus, treatment is unnecessary. However, in some cases when they are big and very visible, one can apply ice or a cold pack. The effected part can also be used to minimize the swelling or soak it in Epsom salt.

It is important to cover and bandage the blister properly to avoid it from rupturing. Zinc cream applied to the blood blister will help dry it up and expedite healing. It is also discouraged to burst the blister yourself as it can get infected easily. Blisters disappear in their own so there is no need for any treatment. Yet, if the blisters are big, you can go to the doctor so that he can use a clean and sterilized needle to burst the blister. Also, if it ruptures on its own, it is advised to clean the wound immediately and apply antiseptic solution to prevent the blood blister from causing infection.

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