Fingernail ridges—those raised lines running vertically or horizontally—can reveal more than just cosmetic concerns. While *“some ridges are harmless and simply a part of the aging process,”* others may signal health issues.

Nails are made of keratin and grow from a root under the cuticle. As we age, natural oils decrease, leading to *“ridges due to dryness and slower growth.”*
Vertical lines (from cuticle to tip) are common with aging and usually harmless. However, if they come with *“discoloration or changes in thickness,”* it’s wise to consult a doctor.

Horizontal ridges, also called Beau’s lines, can indicate serious issues like illness, stress, or conditions such as *“uncontrolled diabetes or vascular disease.”*

Lacking iron, zinc, or B vitamins may cause ridges or brittle nails. *“Iron deficiency, in particular, is known to cause spoon-shaped nails.”* Buffing and moisturizing may help, but avoid overdoing it. If changes are sudden, painful, or come with fatigue or weight loss, *“it is important to consult a healthcare professional.”*