Understanding Blisters: Causes and Prevention

Sep 3, 2026

70 min

Sep 3, 2026 12:31

The science of blisters: Why they form and how to stop them

## Why Blisters Form

Blisters are not just a result of shoes rubbing against the skin. They occur due to repeated shear deformation within the epidermis, causing skin layers to separate and fill with fluid. This can happen with small, repetitive movements rather than dramatic friction.

## Factors Contributing to Blisters

Pressure, friction, and moisture are key factors in blister formation. Moisture alters the frictional properties of skin, making it crucial to manage in warm conditions or during activities like running or walking.

## Prevention Strategies

Proper shoe fit is essential to prevent blisters. Shoes should fit securely without pressure points, and socks should not bunch up. Low friction socks can help reduce shear forces, though no product can completely prevent blisters.

## Product Recommendations

- **Balega Blister Resist Socks**: These socks use a blend of synthetic yarn, mohair, and merino wool to manage moisture and reduce movement.

- **Body Glide Anti Chafe Balm**: This balm provides a lubricating layer to reduce friction in areas prone to rubbing.

- **Compeed Blister Plasters**: Useful for cushioning and protecting areas where blisters have formed, these plasters redistribute pressure and reduce further rubbing.

- **Dr. Scholl's Air-Pillo Insoles**: These insoles offer cushioning and fit management, though they cannot correct poor shoe fit.

Understanding the mechanics of blister formation helps in choosing the right prevention method, focusing on reducing shear rather than just surface friction.

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