Health Tip: Curious About Dark Toenails?

(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.