Most people don’t spend much time thinking about their fingernails until something goes wrong. A discolored nail, an unexpected groove, a tip that starts to curl. These changes tend to get dismissed, but they can point to something worth paying attention to, whether that’s a straightforward care habit or an underlying health condition.

Fingernails grow from the tissue beneath the cuticle and are composed of layered keratin protein. Healthy nails are generally smooth, uniform in color, and free of pitting or irregular grooves. Vertical ridges that run from the base of the nail to the tip are common and largely harmless. They tend to become more visible with age. White spots or faint lines that appear after an injury are also normal and grow out on their own over time.

When to see a dermatologist about your nails

Certain changes move beyond the ordinary and deserve a closer look from a dermatologist or primary care provider. A dark streak running beneath the nail, a nail that begins to separate from the surrounding skin, or nails that thicken, thin, or stop growing altogether all fall into that category.

Pitting, which refers to small puncture-like dents across the nail surface, is another signal worth flagging. So is swelling, pain, or bleeding around the nail bed. These symptoms don’t always indicate something serious, but they’re the kind of thing that benefits from professional evaluation rather than a wait-and-see approach.

The habits that actually support nail health

Keeping nails dry and clean is one of the more straightforward ways to prevent problems. Prolonged water exposure weakens the nail structure and can cause splitting. Wearing cotton-lined rubber gloves while washing dishes or working with cleaning products helps protect against that kind of repeated exposure.

When trimming, sharp manicure scissors or clippers work better than anything improvised. Cut straight across and round the tips gently rather than cutting deep into the corners. Applying hand lotion to the nails and cuticles at the same time as the rest of your hands keeps the surrounding tissue from drying out and cracking.

A nail hardener can add a layer of protection for nails that break easily. Biotin, a B vitamin available as a dietary supplement, has shown some promise in strengthening brittle nails, though it’s worth discussing with a healthcare provider before adding it to a regular routine.

The nail habits worth dropping

Biting nails or picking at cuticles causes more damage than most people realize. The cuticle exists to seal the gap between the skin and nail plate. Disrupting it, even slightly, opens a pathway for bacteria and can lead to infection.

Pulling off hangnails is another habit that tends to backfire. What feels like a quick fix often tears live skin tissue, which causes more irritation than the hangnail itself. Clipping them cleanly is the better approach.

Nail polish remover with acetone is harsher on nails than acetone-free formulas. Limiting how often it’s used, and choosing gentler alternatives when possible, helps prevent the dryness and brittleness that comes with frequent use.

What to know before your next manicure

Nail salons vary widely in their hygiene standards. A current state license displayed at the salon and individual technician licensing through the state board are baseline indicators of a reputable operation. Cuticles should not be cut or removed during a manicure. Their removal increases infection risk.

Tools should be sterilized between clients. Foot bath sanitation is another area worth asking about directly. A well-run salon disinfects baths between each client and cleans the filters on a regular schedule.

Nail care doesn’t demand much. A few consistent habits and a little awareness of what’s changed goes a long way.