LNF

LNF (Lateral Nail Fold)
The lateral nail folds are the folds of living skin that run along each side of the nail plate. They form the side walls of the nail unit and help guide and protect the nail plate as it grows forward from the matrix.

The LNF has several important functions:

• Protects the nail matrix and nail bed from physical injury
• Forms a barrier against bacteria, fungi, and debris
• Helps stabilise the nail plate and keep it correctly aligned

The lateral nail folds are living tissue and contain blood vessels and nerve endings. Because of this, they can bleed, become inflamed, and be painful if cut, over-filed, or traumatised.

Damage or irritation to the LNF may result in:

• Redness and swelling
• Pain or tenderness
• Increased risk of infection
• Changes in nail growth direction
• Ingrown nails if swelling alters nail plate guidance

The LNF should never be aggressively cut or filed. Professional care focuses on gentle cleaning, minimal pressure, and protecting the natural barrier function of this tissue.

In anatomy terms:

• PNF = Proximal Nail Fold (base of the nail)
• LNF = Lateral Nail Fold (sides of the nail)