Nail Health: Signs Your Nails Are Trying to Tell You Something

Nails are surprisingly informative. Changes in their color, texture, shape, or growth rate can reflect nutritional status, underlying health conditions, or simply the effects of your nail care habits. Learning to read these signs helps you catch potential concerns early and understand when a change in your nail health warrants a conversation with a healthcare professional.

White Spots

Small white spots on the nail plate, technically called leukonychia, are extremely common and most often completely harmless. Despite the popular belief that they indicate a calcium deficiency, white spots are usually caused by minor trauma to the nail matrix, the area where the nail is formed, from knocks, pressure, or vigorous cuticle manipulation.

The spots appear weeks after the injury because nails grow slowly. They grow out with the nail and disappear on their own. Occasional white spots are normal and nothing to be concerned about.

Nails that are largely white across the plate rather than spotted may indicate liver conditions and warrant a medical evaluation.

Yellow Nails

Yellowing of the nails is most commonly caused by staining from dark nail polishes, particularly reds and oranges applied without a base coat. The pigment in deeply colored polish leaches into the nail plate over time. Using a base coat before colored polish and taking periodic breaks from heavy pigments resolves this type of yellowing.

Persistent yellowing not related to polish use can indicate a fungal nail infection, which is one of the most common nail conditions. A fungal infection also typically causes thickening, crumbling, and brittleness of the nail. Treatment requires antifungal medication and can take months. A dermatologist or podiatrist can diagnose and recommend appropriate treatment.

Pitting

Small depressions or pits scattered across the nail surface are associated with psoriasis, a skin condition that frequently affects the nails. Nail pitting can appear without obvious skin symptoms of psoriasis, making it an early indicator of the condition. A dermatologist evaluation is appropriate if you notice this pattern.

Ridges

Vertical ridges running from the cuticle to the nail tip are extremely common and generally increase with age. They are usually a normal variation and not a sign of any health concern.

Horizontal ridges, called Beau's lines, are a different matter. These lines run across the nail and indicate that nail growth was interrupted or slowed at a specific point in time. Causes include illness with fever, nutritional deficiency, significant physical or emotional stress, or major surgery. Because nails grow at approximately three to four millimeters per month, the position of the ridge can roughly indicate when the disrupting event occurred.

Nail Separation from the Nail Bed

When the nail plate separates from the nail bed beneath it, starting from the free edge and working backward, the condition is called onycholysis. The separated area typically appears white or yellowish. Causes include injury, fungal infection, thyroid conditions, psoriasis, reaction to certain medications, or prolonged exposure to moisture.

If you notice your nails separating from the nail bed, have a nail technician or healthcare provider assess the cause before continuing nail services, as some underlying causes require specific treatment.

Clubbing

Nails that curve around the fingertips and become rounded and enlarged in a club-like appearance have been associated with cardiopulmonary conditions involving chronically low oxygen levels. This is not a common finding and should be evaluated by a physician if noticed.

When to See a Doctor vs. a Nail Technician

Most nail changes that result from nail care habits — yellowing from polish, white spots from trauma, dryness from acetone — are best addressed by adjusting your nail care routine and consulting your nail technician.

Changes that are persistent, spreading, painful, involve skin changes around the nail, or are accompanied by other symptoms warrant a visit to a dermatologist or general practitioner rather than a salon. A nail technician is a skilled professional in nail care and beauty, not a medical diagnostician, and the best ones will tell you honestly when something looks like it needs medical attention.

Keeping a Record of Changes

If you notice changes in your nails that concern you, taking a photo with your phone is a simple way to track whether the change is progressing, stable, or improving over time. This documentation is also useful when consulting a dermatologist, as it gives them a visual record of the change over time rather than just your description of it. Most nail health changes are benign and related to habits or nutrition, but having clear visual records makes any necessary professional evaluation more efficient and informative.