Onycholysis
Nails

Onycholysis is the painless separation
of the nail from the nail bed. This is a common problem.
It can be a sign of skin disease, an infection or
the result of injury, but most cases are seen in women
with long fingernails.
Discoloration underneath the nail may
occur as a result of secondary infection.
Spontaneous separation of the nail plate starts at
the distal free margin and progresses proximally.
Less often, nail plate separation may begin at the
proximal nail (base) and extend to the free edge.
The nail plate is separated from underlying and/or
lateral supporting structures.
Nail plate separation can be confined
to the nail's lateral borders (rare).