What cause ingrown fingernails?

I really dont know i think it means you have a toe nail growing beneath you other nail.

I really dont know i think it means you have a toe nail growing beneath you other nail.

If you dont know don't answer the question...

It is when your toe nail starts growing into the skin and it can be very painful.

An ingrown toenail is when the nail grows either vertically or horizontally into the surrounding flesh. This can be very painful and rectified via partial or total nail avulsion (removal).