(HealthDay News) -- Have you noticed that some of your toenails are dark and discolored?
The American College of Foot and Ankle Surgeons says possible causes of dark toenails include:
- A trauma to the nail. An example would be an object falling on the nail, causing formation of a bruise.
- Though rare, a dark toenail can signal malignant melanoma.
- A fungal infection of the nail.
- A chronically ingrown nail.
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