Which of the following is a common sign of onychomycosis?

The presence of discoloration and thickening of the nail bed is a well-known characteristic of onychomycosis, which is a fungal infection of the nails. This condition is often marked by changes in the appearance of the nail, including yellowing or brownish discoloration, as well as a significant thickening, which can lead to an abnormal nail structure. The fungal infection can cause the nail to become brittle and more prone to breaking, ultimately affecting its overall health and appearance.

In cases of onychomycosis, the appearance of the nail becomes a crucial diagnostic indicator. As the infection develops, the nail may also become distorted in shape, which is not typically associated with other types of nail conditions. Understanding these signs is essential for accurate assessment and treatment of this common fungal infection.