How does a bacterial infection in the nail plate appear in its most advanced stages?

In the advanced stages of a bacterial infection in the nail plate, the appearance of the nail can vary significantly from its normal state. One notable characteristic is the presence of a blackened area, which typically results from a severe bacterial invasion that disrupts the healthy integrity of the nail. This discoloration occurs as bacteria break down the nail tissue, leading to necrosis and the accumulation of debris, which can give the nail a dark appearance.

A bacterial infection can lead to other changes in the nail, but the predominant and most alarming visual cue at this advanced stage is the black coloration. This indicates a serious infection and could potentially suggest the presence of underlying issues that have not been addressed promptly. Regular monitoring and suitable treatment are essential to prevent further complications. Other appearances like red and inflamed or yellow and brittle may indicate milder infections or other conditions, but they do not signify the severity associated with a blackened nail.