The nail is thickened and opaque, with subungual hyperkeratosis and onycholysis.
Blunt or crush injuries can cause bleeding under the nail plate (subungual hematomas), which can be very painful.
If blood has accumulated under the nail (subungual hematoma), the doctor may drain it by piercing through the fingernail.
In 60 percent of patients with subungual hematomas that involve more than 50 percent of the nail surface, laceration is repairable.
Amorolfine is a topical product that shows promise in the treatment of white-colored fungal infections known as subungual onychomycosis.