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Nail Disorders

Nail Disorders

Nail changes are easy to dismiss as a cosmetic issue, but nails can reflect a surprising amount about your overall health, from a simple fungal infection to nail psoriasis to, in rarer cases, an early sign of skin cancer or an underlying systemic condition. At Genesis Dermatology in Jupiter, FL, board-certified dermatologists evaluate nail changes to identify the specific cause and get you the right treatment, rather than guessing based on appearance alone.
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What Are Nail Disorders?

Nail disorders cover a wide range of conditions. Fungal nail infection (onychomycosis) is the most common, accounting for roughly half of all nail disorders, and develops when fungus invades the nail plate, causing thickening, discoloration, and brittleness. Nail psoriasis affects up to half of people with psoriasis and can cause pitting, discoloration, and separation of the nail from the nail bed, symptoms that can closely resemble a fungal infection but require a different treatment approach.

Ingrown toenails, where the nail edge grows into the surrounding skin, are another common and often painful issue. Less commonly, nail changes can signal something more serious: a new dark streak or band under the nail can be a warning sign of subungual melanoma, and certain nail shapes or textures, like clubbing, can point to an underlying lung, heart, or digestive condition.

How to Detect a Nail Problem

Watch for these common patterns:
  • Thickened, discolored (yellow, white, or brown), brittle, or crumbling nails, often a sign of fungal infection
  • Pitting, ridging, or a nail lifting away from the nail bed, which can indicate nail psoriasis
  • Redness, swelling, or pain along the side of a nail, common with an ingrown toenail
  • A new or changing dark streak, band, or spot under the nail, especially one with irregular color or edges, or that's widening over time
  • Nails that curve downward and appear rounded or bulbous (clubbing), which can point to an underlying health condition

When Should You See a Doctor?

Schedule an evaluation if:
  • A nail issue isn't improving with basic at-home care or over-the-counter treatment
  • You're not sure whether you're dealing with a fungal infection or nail psoriasis, since they can look similar but need different treatments
  • You notice a new or changing dark streak or spot under a nail, this should be evaluated promptly
  • An ingrown nail is painful, swollen, or shows signs of infection (redness, warmth, or drainage)
  • Several nails are changing shape or texture without an obvious cause

What Happens If Nail Disorders Are Left Untreated?

Fungal nail infections don’t resolve on their own and tend to spread, both to other nails and, left long enough, into the surrounding skin, becoming progressively harder to treat the longer they’re left alone. Untreated nail psoriasis can lead to more extensive nail damage and discomfort, and an ingrown toenail that isn’t addressed can develop a secondary bacterial infection.

The most serious risk involves overlooking a warning sign of subungual melanoma. Because it’s frequently mistaken for a bruise, fungal infection, or other benign nail issue, this type of melanoma is often diagnosed at a more advanced stage than skin melanoma elsewhere on the body, by which point it carries a higher risk of local tissue invasion and spread, and in severe, delayed cases, can even threaten the digit itself. This is exactly why any new or changing dark streak under a nail deserves prompt evaluation rather than a wait-and-see approach.

The Genesis Dermatology Process

Here’s what to expect when you come in with a nail concern:
  • A detailed exam of the affected nail or nails, along with a conversation about how and when the changes started
  • Nail clippings sent to a lab when needed to confirm a fungal infection or rule one out, since fungal infections and nail psoriasis can look alike
  • A biopsy if a nail change raises any concern for melanoma or another serious condition
  • A personalized treatment plan: oral or topical antifungal therapy for fungal infections, targeted treatment for nail psoriasis (sometimes coordinated with your broader psoriasis care), or a straightforward in-office procedure for a problematic ingrown nail
  • Referral to your primary care provider if a nail change suggests an underlying systemic condition worth investigating further
  • Follow-up care, since nail conditions, especially fungal infections, often take several months to fully resolve as the nail grows out

Ready to Take the Next Step?

Nail changes are worth a proper diagnosis, not a guess. Schedule a consultation with the board-certified dermatologists at Genesis Dermatology in Jupiter, FL, to find out what’s really going on and get the right treatment started.
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Frequently Asked Questions

How can I tell if it's nail fungus or nail psoriasis?
The two can look very similar, both cause thickening, discoloration, and nail separation, which is why a professional evaluation, sometimes with a lab test on nail clippings, is the most reliable way to tell them apart and get the right treatment.
Fungal nail infections are notoriously difficult to clear with topical over-the-counter products alone because the fungus lives deep within the nail plate. Prescription oral or topical antifungal treatment is often needed for a lasting result.
Not always, dark streaks can result from minor trauma or be a normal variant in some individuals. But any new, changing, or unexplained dark streak or spot under a nail should be evaluated promptly to rule out subungual melanoma.
Because nails grow slowly, treatment often takes several months to a year to see a fully clear nail, even once the infection itself is under control. Toenails, which grow more slowly than fingernails, typically take longer.
Yes, though treatment is often more effective when coordinated with your overall psoriasis management. Your dermatologist can tailor a plan specifically targeting your nail symptoms.
If it’s significantly painful, swollen, red, or draining fluid, or if home care hasn’t improved it within a few days, it’s time for an in-office evaluation to prevent infection and resolve it properly.