Medically reviewed by Casey Gallagher, MD Onycholysis happens when your fingernail or toenail separates from its nail bed.

separation of part of your nail from the nail bed spots on your nail that are white or transparent in color ... skin of the nail bed is shorter or more uneven. DNB can cause your nail to ...

In some cases, this band may have an uneven border adjoining the white part of the nail. People may also have ridges running the length of the nail or nail thickening. A researcher called Richard ...