Which of the following is a sign of a fungal infection in nails?

A sign of a fungal infection in nails often includes discoloration and thickening of the nail. Fungal infections can cause nails to change in color, becoming yellow, brown, or sometimes even white, and typically, the affected nails will become thicker and may also be brittle or start to crumble. This physical alteration in the structure and appearance of the nail is a clear indicator of a fungal issue, making it important for a manicurist to recognize this symptom for appropriate referral or treatment.

Bright red color is more commonly associated with other types of infections or trauma rather than a fungal infection. White spots may indicate minor trauma or might be related to other non-fungal conditions, and the smell of nail polish is not related to any infection, but rather a characteristic of nail products. Understanding these signs can help in maintaining healthy nails and preventing the spread of infections.