Paronychia is a skin infection that develops around the nail. It occurs when bacteria or fungi get under the skin. Paronychia can result from biting or chewing the nails, but it is more common ...

These infections most often affect the toes, causing nails to thicken, crumble and become discoloured. The effect isn’t just cosmetic, though. Fungal nails can cause paronychia – pain and inflammation ...