Nail Lines: What They Can Reveal About Your Health

Here are some common types of nail lines and what they may mean:

1. Vertical ridges (lines running from cuticle to tip)

• Very common, especially with age.
• Often related to normal changes in the nail as it grows.
• Usually not a cause for concern if the nails are otherwise healthy.

2. Horizontal grooves (Beau’s lines)

• These are indentations that run across the nail.
• They can occur after a period of stress on the body, such as:
  • A significant illness or infection.
  • Injury to the nail.
  • Major nutritional or health changes.
• Several nails being affected at once may be worth discussing with a healthcare professional.

3. White lines or spots

• Small white spots are often due to minor nail injury and usually grow out.
• Persistent white bands or changes affecting many nails may have other causes and should be checked.

4. Dark lines under the nail

• A brown or black streak can sometimes be caused by injury or pigment changes.
• A new, widening, irregular, or very dark streak, especially on one nail, should be assessed by a healthcare professional to rule out more serious causes.

5. Changes with brittle or splitting nails

Possible contributors include:

• Frequent exposure to water or chemicals.
• Dryness.
• Some nutrient deficiencies.
• Certain medical conditions.

When to seek medical advice

Have nail changes checked if you notice:

• A new dark streak or rapidly changing mark.
• Nail changes affecting only one nail without a clear injury.
• Nail separation from the nail bed.
• Pain, swelling, bleeding, or changes around the nail.
• Sudden widespread changes.

Healthy nails are influenced by many factors, including genetics, age, nutrition, and general health. Nail appearance alone cannot diagnose a disease, but unusual or persistent changes can be a useful reason to seek medical advice.