my nails have these weird ridges on them. whats up?

[lolalavonda]

its not just on the white part and its on almost every nail. help!

 

[Ricky]

could be you were sick as a kid.

 

[Se Faire Belle]

My toenail has very deep ridges.
I don't know why this is, but if you buff them every day, it will soon go away.