Melanonychia, also known as a dark or black line on the nail, causes a streak of dark pigmentation that runs along the nail ...

Black or brown lines appearing on fingernails or toenails are a common finding and are often dismissed as cosmetic changes (1 Trusted Source Melanonychia: Etiology, Diagnosis, and Treatment Go to ...

Melanonychia is a brown or black stain in your fingernail or toenail. You can have a dark line on one nail, a few nails, or all of your nails. The line is caused by the natural color in your body ...

Your nails serve as more than just a canvas for your favorite polish color. These small but significant parts of your body can reveal important information about your overall health, often acting as ...

If you are staring at a dark spot under your fingernail, you may want to see a dermatologist. It could be a form of melanoma. "It is rare, and it's scary that it's rare, because a lot of people would ...

Should you trim your cuticles? How do you cut a hangnail? Is it better to use a cardboard or crystal file? Dermatologists and a nail technician share basic nail health tips.

Endocarditis is inflammation in the heart’s inner lining. One possible symptom is splinter hemorrhages, thin red or reddish-brown lines under the fingernails. These lines appear when small blood ...