3.2 Nail Disorders & Conditions That Preclude Treatment
Key Takeaways
- Nail disorders are divided into cosmetic conditions a tech may work around and conditions that require refusal of service and physician referral
- Onychomycosis (fungal infection), paronychia (bacterial infection of the nail fold), onychia, and any condition with active inflammation, pus, or blood must be referred and never serviced
- Disorders like onychorrhexis (longitudinal ridges), leukonychia (white spots), onychoschizia (splitting), and hangnail are generally cosmetic and can be managed gently
- Beau's lines are transverse depressions from a past illness or trauma; they indicate a past systemic event, not an active contagious condition
- Nevada nail techs never diagnose, prescribe, or treat medical conditions; scope-of-practice limits the tech to cosmetic care and referral
The Exam's Sorting Task
Nevada's outline splits Domain II into three sub-topics: nail structure, nail conditions that preclude treatment, and health conditions that preclude treatment. The exam does not ask you to diagnose. It asks you to sort—given a description or image, decide whether the nail can be serviced, must be modified, or must be refused and referred.
Nevada law reinforces this in NAC 644A.780: a licensee shall not perform any service upon a surface of the skin or scalp of a client where such skin is inflamed, infected, broken or otherwise compromised, and shall not perform any service on a client whose skin shows signs of secretion of any bodily fluids. A nail technician may not diagnose, treat, or prescribe for any nail or skin disease. Your job is to recognize the red flags, decline the service, and refer to a physician. A violation of NAC 644A.780 is classified as gross malpractice under NAC 644A.865.
Common Nail Disorders and Diseases
The table below lists the disorders most often tested. Definitions and appearance follow Milady Standard Nail Technology.
| Disorder | Definition / Appearance | Tech Action |
|---|---|---|
| Onychauxis (hypertrophy) | Abnormal thickening of the nail plate | Cosmetic; file gently to thin, refer if severe |
| Onychatrophy | Wasting away or shrinking of the nail | Refer; thin atrophic nails are easily injured |
| Onychorrhexis | Longitudinal ridges running nail to free edge | Cosmetic; buffer lightly, avoid deep filing |
| Onychoschizia | Splitting or layering of the free edge | Cosmetic; recommend keeping nails short and moisturized |
| Leukonychia | White spots on the plate from minor trauma to matrix | Cosmetic; grows out with the nail |
| Melonychia | Dark vertical band under the plate | Refer; can be benign pigment or a sign that needs medical evaluation |
| Pterygium | Forward growth of cuticle onto the plate | Cosmetic; gentle pushing, never cut living tissue |
| Hangnail (agnail) | Torn skin at the sidewall | Cosmetic; trim dead tag only, do not pull |
| Bruised nail | Dark discoloration from trauma; blood under plate | Defer until healed; do not apply pressure |
| Ridged nail | Surface grooves from age or trauma | Cosmetic; light buffing only |
| Plicated nail | Nail folds sideways into the skin | Refer if it ingrows and inflames; otherwise cosmetic care |
| Trumpeted nail | Nail curves downward like a trumpet | Cosmetic with caution; refer if painful or distorting |
| Eggshell nail | Thin, white, curved plate lacking flexibility | Cosmetic; very gentle, avoid heavy product |
| Beau's lines | Transverse depressions across the plate | Cosmetic once the cause has passed; indicates past illness/trauma |
| Onychomycosis | Fungal infection; yellow, thick, crumbling plate | Refer — do not service |
| Paronychia | Bacterial infection of the nail fold; red, swollen, often with pus | Refer — do not service |
| Onychia | Inflammation of the nail matrix with possible pus | Refer — do not service |
| Pyogenic granuloma | Red, raised, bleeding lesion at nail fold | Refer — do not service |
The Triage Rule
A simple rule covers almost every exam item: if there is fungus, active infection, inflammation, pus, or blood, do not service—refer. Everything else is generally cosmetic and can be handled gently, but you still observe the client and defer if the nail is too fragile.
Disorders a Tech Can Cosmetically Work Around
- Onychorrhexis (longitudinal ridges) — light buffing, never deep filing that thins the plate.
- Leukonychia (white spots) — no action needed; spots grow out.
- Onychoschizia (splitting) — keep nails short; recommend hydration.
- Hangnail (agnail) — trim the dead tag with nippers; never pull, which tears living tissue.
- Beau's lines — they record a past event (high fever, illness, injury); if the cause has passed, normal service is fine.
- Pterygium — gently push the extended cuticle; never cut living tissue.
Disorders That Preclude Treatment and Require Referral
- Onychomycosis — a contagious fungal infection. The plate is yellow-brown, thick, brittle, and often separates from the bed. Do not file, do not apply product, do not soak. Refer to a physician.
- Paronychia — a bacterial infection of the nail fold, frequently caused by Staphylococcus. The fold is red, swollen, tender, and may weep pus. Service would spread bacteria and worsen the infection.
- Onychia — inflammation of the matrix itself, often with pus; can cause permanent plate loss. Refer immediately.
- Pyogenic granuloma — a red, raised, easily bleeding lesion at the proximal fold, usually after trauma. Refer; this is not a cosmetic condition.
- Any nail with blood, open skin, or active inflammation — defer service, refer if needed.
The Referral Duty and Nevada Scope
Nevada nail technicians operate within a defined scope. You may:
- Observe the nail and skin during consultation.
- Refuse or defer a service when a contraindication is present.
- Refer the client to a physician for any suspected medical condition.
You may not:
- Diagnose the disorder by name as a medical opinion.
- Prescribe treatment, medication, or home remedies.
- Treat an infection, fungus, or disease with any product or instrument.
On the exam, any answer choice that has the tech diagnosing, prescribing, or treating a medical condition is wrong. The correct answer is to refuse the service and refer.
Exam Scenario
A Domain II item might describe a client whose great toenail is yellow, thick, and crumbling at the corner. The question asks what the tech should do. The correct action is to decline the pedicure and refer the client to a physician—do not file, do not thin the nail, do not apply polish to hide it. Another item may show a client with a single white spot on an otherwise healthy nail; that is leukonychia and a normal cosmetic service is fine.
Key Takeaways
- Memorize the referral list: onychomycosis, paronychia, onychia, pyogenic granuloma, anything with pus or blood.
- Onychorrhexis, leukonychia, onychoschizia, hangnail, Beau's lines, and pterygium are cosmetic; work gently.
- Nevada scope: observe, refuse/defer, refer; never diagnose, prescribe, or treat.
A client's toenail is yellow-brown, thick, and crumbling, with separation from the nail bed. What is the nail technician's correct action?
A client has a single white spot near the free edge of an otherwise healthy nail. What condition is this, and how should the tech handle it?