What is a common sign of a nail infection?

A common sign of a nail infection is discoloration and swelling. When a nail becomes infected, it often exhibits changes in color, which can range from yellow to green, depending on the type of infection. This discoloration is typically accompanied by swelling around the nail bed, indicating inflammation. The presence of pus may also be observed in more severe cases, which is a typical response from the immune system reacting to the infection.

Other options, such as smooth nail texture, increased nail hardness, and rapid nail growth do not usually correlate with signs of infection. Smooth nail texture is generally a sign of healthy nails, while increased hardness and rapid growth are not typically associated with infections but rather with nutritional factors or health conditions. Thus, the combination of discoloration and swelling serves as a significant indicator of a possible nail infection.