Fungal nail infection - Symptoms 

Fungal nail infection can look ugly because the nail often becomes thickened and discoloured. The nail can turn white, black, yellow or green.

The nail can sometimes become brittle, with pieces of nail breaking off or even coming away from the toe or finger completely.

Underneath and around the nail (the nailbed), the skin can sometimes become inflamed and painful.

If a toenail is infected and painful, it can become difficult to walk.