Blisters; Injury or Protection?

Blisters are small, fluid-filled sacs that form on the skin due to various types of damage or irritation. They act as the body’s natural defense mechanism to protect underlying tissue and promote healing. Blisters occur for several reasons:

Causes:

1. Friction: This is the most common cause. Repeated rubbing, especially on the feet or hands (from shoes or tools), can cause the skin layers to separate, allowing fluid to collect and form a blister.
2. Burns: Thermal burns from heat or sunburn can cause the skin to blister as part of the healing process.
3. Chemical Exposure: Some chemicals, such as harsh cleaning agents or allergens, can cause blisters to form.
4. Infections: Blisters can form due to bacterial, fungal, or viral infections, such as in conditions like impetigo or herpes.
5. Medical Conditions: Certain autoimmune diseases, like pemphigus or bullous pemphigoid, lead to blister formation as part of their symptoms.

Purpose:

Blisters protect the damaged skin beneath by cushioning it with fluid, preventing further harm or infection. The fluid inside a blister, which is often clear or slightly cloudy, aids in healing by creating a moist environment that promotes skin regeneration.

Blisters usually resolve on their own if left intact but may require medical attention if they become painful, infected, or persist for long durations.