What Those Vertical Ridges on Your Fingernails Might Be Telling You — Especially After 40

In rarer cases, pronounced vertical ridges could be a sign of a health issue that needs attention. Some possible causes include:

  • Poor circulation
  • Thyroid imbalances (both underactive and overactive)
  • Rheumatoid arthritis
  • Skin conditions like eczema or psoriasis

If nail ridges are accompanied by other unusual symptoms — such as joint pain, changes in skin texture, or unexplained fatigue — it’s best to have it checked by a healthcare professional.

When to See a Doctor

Although vertical ridges are typically harmless, there are times when they could signal something more serious. You should seek medical attention if your nail ridges are accompanied by:

  • Dark brown or black streaks underneath the nail
  • Nail splitting, thickening, or peeling
  • Redness, pain, or swelling around the nail bed

These may point to a fungal infection, injury, or — in rare cases — a form of skin cancer called melanoma, which can develop under the nail.

Early detection matters, so never ignore a sudden or dramatic change in your nail’s appearance.

How to Care for Aging Nails

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