Medically reviewed by Susan Bard, MD A black line on the nail could be normal, such as when it is just a color variation.

From the mysterious white flecks that sometimes appear on nails to unusual ridging or changes in thickness, what do these ...

Nail health can indicate potential underlying health issues, with changes such as ridges, discoloration, and textures being ...

Issues with making skin cells and a skin protein called keratin can change how your nails grow, leading to onychorrhexis. Onychorrhexis causes vertical ridges on your fingernails. It often happens ...

Nail pitting could be a sign of psoriasis, or a skin disease that causes dry, thick patches of skin. 9. Dark Stripes or a Painful Growth See a healthcare provider right away if you have black ...

As people age, vertical nail ridges, known as onychorrhexis, can form due to nutritional deficiencies, anemia, digestive disorders, dehydration, and some fatal diseases. Effective treatments ...

Nails may hurt due to an infection, nail biting, injury, or other causes. Treatment depends on the cause and may involve home remedies and medical treatments. Nail pain may be due to temporary ...

I have a question - Can Raynaud’s syndrome cause nails to turn black? Ed’s note: This question comes from a reader in response to the December 28 article, ‘My child’s toe nails have turned ...

You may have splinter hemorrhages if you have dark, vertical lines under your nails that look like splinters. The most common cause is trauma to the nail. Splinter hemorrhages can also happen due ...

Other Causes of Black Spots on the Lips Dark marks on the lips can appear for many other reasons, often related to dryness or sun damage. In most cases, they don't mean there’s a dangerous skin ...