What is Inside a Blister?
A blister is a small pocket of fluid that forms within the upper layers of your skin. Most blisters are filled with a clear fluid called serum. This serum leaks from surrounding tissues in response to skin damage. It acts as a protective cushion for the injured tissue, aiding in the healing process.
While serum is the most common fluid found inside a blister, there are exceptions:
- Blood blisters: These contain blood, usually resulting from more significant trauma.
- Infected blisters: If a blister becomes infected, it may contain pus, indicating the presence of infection.
What Causes Blisters?
Blisters form as a protective mechanism when the skin is damaged, often due to:
- Friction: This is the most common cause, often from ill-fitting shoes rubbing against the skin.
- Burns: Heat or cold can cause blisters to form.
- Chemical burns: Contact with certain chemicals may also result in blisters.
Why the Fluid is Important:
The fluid inside a blister serves a crucial purpose:
- Cushioning: It protects the underlying skin from further damage.
- Healing: It provides a moist environment that supports tissue repair.
It is generally advisable to leave intact, uninfected blisters alone to heal naturally. However, if a blister is large, painful, or shows signs of infection, medical attention may be necessary.
