What is NOT a common reason for nail discoloration?

Nail discoloration can occur for various reasons, and understanding the common causes helps in assessing nail health. Using nail polish is typically not a reason for nail discoloration in itself. While certain types of nail polish, particularly darker or heavily pigmented ones, can temporarily stain the nails, this effect is usually superficial and fades with proper removal.

In contrast, injury can cause discoloration due to bleeding under the nail or damage to the nail bed. Fungal infections can lead to changes in color due to the growth of fungi within or under the nail plate, often resulting in yellowing or greenish hues. Poor nutrition can affect nail health overall, leading to changes in color and texture as a result of deficiencies in essential vitamins and minerals.

By focusing on why using nail polish is not a typical cause of significant nail discoloration, we can distinguish it from the other options that indicate underlying health issues or trauma affecting the nails.