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

Fingernails, often overlooked, are biological indicators of health. Conditions like clubbing, white flecks (leukonychia), ...

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 ...

A nail technician has claims that your nails could reveal whether you’ve got underlying health conditions – and two of her clients found out they had tumors, all because of their nails. Nail ...

Splinter hemorrhages appear as dark, vertical lines under your fingernails or toenails. The most common cause of splinter hemorrhages is trauma to your nail. See a doctor if you have splinter ...

(NEXSTAR) – What started out as a “tiny little brown line” on one woman’s fingernail led to a rare, potentially life-threatening medical condition, one that she’s now trying to help others catch early ...