The fungal infection may still be lurking under your nails ... nails by making them less brittle and discolored. Another product that promises similar results uses a tiny LED light that you clip onto ...

When trauma occurs, blood may pool under the nail, creating a dark purple or black discoloration (medically known as a subungual hematoma). This adds pressure and can eventually cause the nail to ...

Symptoms of a bruised toenail can include sudden pain, bleeding under the nail, discoloration, and pressure under the nail ...