Nail fungus, medically known as onychomycosis, is an infection of the nail unit caused by fungi. We diagnose it with a focused exam and lab testing, and we offer medical and procedural options that aim to clear the infection and restore the nail's appearance. If you are seeing thickened, discolored, or brittle nails, a dermatology evaluation clarifies the cause and the safest treatment plan.
What is nail fungus
Nail fungus is an infection of the nail plate, nail bed, or surrounding tissues. The most common organisms are dermatophyte fungi, although yeast such as Candida and nondermatophyte molds can also cause infection. The condition often begins as a white or yellow spot under the tip of the nail and may progress to nail thickening, discoloration, brittleness, and separation from the nail bed.
How dermatologists define and confirm the diagnosis
We use a clinical exam plus targeted testing to separate fungal infection from other causes of abnormal nails, such as psoriasis, trauma, lichen planus, or chronic contact dermatitis. Tests commonly used in our office include microscopic examination of nail clippings, fungal culture, and, when needed, periodic acid Schiff stain from a lab processed nail sample. These tests help us choose the right therapy and avoid unnecessary or ineffective treatments.
Why nail fungus matters in Newburgh and the Hudson Valley
Local climate, footwear choices, and community facilities affect how often people get fungal nail infections. In the Hudson Valley, activities like pool use, communal locker rooms, and long days in closed shoes can increase exposure to the fungi that cause onychomycosis. For some patients, nail fungus causes pain, interferes with walking or shoe wear, or becomes a persistent cosmetic concern. For people with diabetes or circulation problems, an infected toenail can raise the risk of secondary bacterial infection, which is why careful evaluation is important.
At Greenblatt Henry A MD | Horizon Family Medical Group | Dermatology in Newburgh, we assess each patient in the context of their health history, footwear and activity patterns, and any existing skin conditions. We are a licensed and insured dermatology practice offering both medical management and in office procedures for nail conditions.
Key concepts to understand
- Onychomycosis. The medical term for fungal infection of the nails.
- Common causes. Dermatophytes are the most frequent, with Candida and molds less often implicated.
- Symptoms. Yellow or white discoloration, thickening, crumbling, lifting of the nail from the nail bed, and sometimes odor.
- Diagnostic tests. Microscopy, fungal culture, nail clipping for histology, or laboratory stains help confirm the diagnosis.
- Treatment categories. Topical antifungals, oral antifungals, and procedural approaches such as debridement or partial nail removal when appropriate.
- Expectations. Treatment can be slow, and visible improvement often lags behind eradication of the organism because nails grow slowly.
Treatment options compared
| Treatment type | How it works | When we consider it |
|---|---|---|
| Topical antifungals | Applied to the nail surface or under the nail to target surface infection | Best for mild, limited infections or when oral therapy is not an option |
| Oral antifungals | Medication taken by mouth that reaches the nail through the bloodstream | Used for moderate to severe infections or when topical therapy has failed |
| In office procedures | Mechanical thinning of the nail or partial nail removal to reduce fungal load and allow treatments to penetrate | Considered for thick painful nails, diagnostic sampling, or when rapid improvement is needed for footwear or comfort |
Common questions we hear
How do we tell fungal nail from other nail problems
Many nail disorders look similar. We combine history, physical exam, and laboratory testing such as KOH or fungal culture with nail clipping for histology when necessary. Accurate diagnosis avoids unnecessary medication and targets the right therapy.
How long does treatment take
Treating nail fungus takes time because nails grow slowly. A toenail may take several months to show clear improvement after the fungus is eradicated. We set realistic expectations and plan follow up to monitor progress and side effects.
Are oral antifungals safe
Oral antifungals can be very effective, but they have potential interactions and effects on the liver. We review your medical history, medications, and laboratory testing to decide if systemic therapy is appropriate. When chosen, we monitor for side effects as indicated.
Pro tip: Bring a list of your current medications and any history of liver disease to your dermatology visit. That helps us select treatments safely.
When to see a dermatologist
Make an appointment if you have
- Increasing nail thickening that affects footwear or walking
- Nail separation from the nail bed, bleeding, or pain
- Underlying diabetes, poor circulation, or immune suppression
- Nails that do not improve with over the counter remedies
- Any nail change that is new, rapidly changing, or concerning
Related services we provide
We evaluate and treat nail conditions as part of our dermatology services. Related care we provide includes routine dermatology visits, specialized nail condition treatment options, and in office procedures when tissue sampling or nail work is needed. For patients also managing acne, eczema, or psoriasis, we coordinate care so treatments for skin disease and nail problems work together.
Related topics and local resources
For more detailed procedural information, our skin biopsy guide explains how we safely collect tissue when diagnosis is uncertain. To explore other common skin concerns we manage, visit our topics collection and see our full services hub.
For authoritative clinical background on onychomycosis, the American Academy of Dermatology provides patient focused guidance and is a good resource for general information and prevention tips.
We see patients from Newburgh and neighboring Hudson Valley communities. When appropriate, we coordinate with primary care providers and specialists, including podiatrists, for comprehensive care planning.
Helpful resources
Trusted sources for patient information and professional guidance include the American Academy of Dermatology patient page on nail fungus, which outlines causes and treatment options. For procedural questions about laboratory testing, university pathology resources explain nail biopsy and fungal stains in more detail.
Frequently asked questions
What causes nail fungus
Most cases are caused by dermatophyte fungi that thrive in warm, damp environments. Yeast such as Candida and nondermatophyte molds can also cause infection, especially after trauma or in people with weakened immunity.
Can nail fungus spread to other people or nails
The fungi that cause nail infections can spread, most often via shared damp surfaces such as shower floors or through shared footwear. Good foot hygiene, clean socks, and avoiding walking barefoot in communal areas reduce risk.
Will over the counter treatments work
Over the counter topical remedies may help mild surface infections but are often insufficient for established nail infections. Accurate diagnosis and a tailored plan from a dermatologist improve the chance of clearing the fungus.
Are there risks to oral antifungal medications
Oral antifungals can interact with other medications and may affect the liver. We evaluate medical history and order laboratory testing as needed before prescribing systemic therapy. Not every patient is a candidate for oral therapy.
How long after treatment will my nail look normal
Visible improvement can lag because nails grow slowly. Toenails may take many months to appear normal again after the infection is controlled. We monitor progress with follow up exams and tests when appropriate.
Key takeaway
Nail fungus is common and treatable, but correct diagnosis matters. We use examination and laboratory testing to identify the cause and then recommend medical or procedural options based on the infection, your health history, and your goals for appearance and function.
Learn more and find our location
View our Google Business Profile to read patient reviews and get directions, and explore related pages to learn more about nail and skin care at our Newburgh office.