Black toenails are usually the result of toenail injury. However, there are other things that can cause a black toenail, including fungal or bacterial infections. Most cases of black toenails aren ...

A black line on your nail (medically known as melanonychia) causes a streak of dark pigmentation that runs along the nail bed. It can be a normal color variation, especially in people with darker ...

Typically, toenails are more or less a clear, partially translucent color. But sometimes, they can appear yellow, green, blue, purple, or black. Several things can cause toenail discoloration ...

Fungi are tiny organisms that you can only see through a microscope. Many different types can cause a nail infection. Sometimes they live on your skin and don’t cause any trouble. But if you ...

Also called Mees’ lines, these chalky white horizontal streaks on the fingernail are the result of abnormal keratinization in the nail plate. In many cases, there is no obvious cause ...