Louisville Beauty Academy (LBA), The College of Human Service of Di Tran University, proudly shares Chapter X of THE COMPLETE NAIL LICENSING MASTER BOOK — 2025 Edition.
As part of our mission to humanize education and remove fear from the licensing process, we are releasing all 50 chapters online for free for students, schools, ESL learners, and future beauty professionals across the nation.
Each chapter is part of the most comprehensive nail licensing textbook ever created, designed specifically for State Board Theory & Practical and built on our core philosophies:
YES I CAN™ (courage, confidence) and
I HAVE DONE IT™ (achievement, professionalism).
Louisville Beauty Academy continues to adapt and adopt at light speed, providing not only this complete textbook but also upcoming videos, visual guides, and step-by-step practical demonstrations, all aimed at ensuring every learner feels supported and empowered.
LBA is proud to serve as a true YES I CAN™ institution and a Center of Excellence in beauty education.
CHAPTER 17 — SKIN & NAIL DISORDERS
Louisville Beauty Academy (LBA) — YES I CAN™ Recognize, Protect, and Refer Safely
Nail technicians DO NOT diagnose diseases.
Nail technicians DO NOT treat medical conditions.
Nail technicians ONLY:
- recognize signs
- stop the service
- recommend the client see a medical professional
Louisville Beauty Academy teaches:
“Recognition is responsibility.
Referral is professionalism.”
⚠️ LBA DISCLAIMER — IMPORTANT
This chapter is for identification only, not diagnosis.
Students are trained to say:
“For your safety, I cannot perform the service today.
I recommend seeing a licensed medical professional.”
🔑 KEYWORDS, DEFINITIONS, EXAMPLES & SENTENCES
(ESL-friendly, liability-safe)
A. NAIL DISORDERS (Non-Infectious)
Usually safe to service with caution
1. Onychophagy (Nail Biting)
Meaning: Habitual nail biting.
Sentence: “We can safely manicure bitten nails gently.”
LBA Tip: Gentle service.
2. Onychorrhexis
Meaning: Split or brittle nails.
Sentence: “Brittle nails need gentle filing and oil.”
LBA Tip: Fragile—be kind.
3. Beau’s Lines
Meaning: Horizontal depressions in nail plate.
Sentence: “We can perform service but avoid aggressive filing.”
LBA Tip: Growth disruption marks.
4. Hangnail
Meaning: Torn piece of skin next to the nail.
Sentence: “We can trim dead hangnails—not living skin.”
LBA Tip: Trim only dead tissue.
5. Leukonychia
Meaning: White spots caused by minor injury.
Sentence: “Safe to service, spots grow out.”
LBA Tip: Harmless.
6. Plicatured Nail
Meaning: Folded or curved nail edges.
Sentence: “Service with care to avoid pain.”
LBA Tip: Curved shape.
7. Agnail
Meaning: Loose skin near nail.
Sentence: “Trim only dead part carefully.”
LBA Tip: Common and safe.
8. Onychauxis
Meaning: Thickened nail.
Sentence: “Service gently, reduce length carefully.”
LBA Tip: Thick nail.
9. Pseudohangnail
Meaning: Excess dry skin near nail.
Sentence: “Moisturize and gently push back.”
LBA Tip: Dry area.
B. NAIL DISEASES (Infectious – STOP SERVICE)
❌ Never perform service
❌ Refer to a medical professional
10. Onychomycosis (Nail Fungus)
Meaning: Fungal infection of nail plate or bed.
Signs: yellow, brown, thick nails.
Sentence: “We cannot service fungal nails—please see a doctor.”
LBA Tip: STOP service.
11. Tinea Pedis (Athlete’s Foot)
Meaning: Fungal foot infection.
Sentence: “No pedicure today—this must be medically treated.”
LBA Tip: STOP immediately.
12. Paronychia
Meaning: Bacterial infection around nail fold.
Signs: redness, swelling, pain.
Sentence: “This looks infected—I must refer you to a doctor.”
LBA Tip: Inflamed area—stop.
13. Onychia
Meaning: Inflammation of the nail matrix.
Sentence: “We cannot perform service—seek medical care.”
LBA Tip: Matrix infection.
14. Onycholysis
Meaning: Nail separating from nail bed.
Sentence: “We cannot apply product to lifted nails.”
LBA Tip: Do not glue or cover.
15. Pseudomonas (“Green Nail Syndrome”)
Meaning: Bacterial infection causing green discoloration.
Sentence: “Green nails require medical attention—no service today.”
LBA Tip: Never cover green nails.
16. Warts (Verruca)
Meaning: Viral growth on hands/feet.
Sentence: “No service—warts are contagious.”
LBA Tip: Highly contagious.
17. Herpetic Whitlow
Meaning: Viral infection on fingers.
Sentence: “We cannot touch or service viral lesions.”
LBA Tip: Stop service completely.
C. SKIN DISORDERS & CONDITIONS
Some safe, some NOT safe
18. Eczema
Meaning: Dry, inflamed patches.
Safe? ✔ With caution
Sentence: “We can proceed but avoid irritated areas.”
LBA Tip: Gentle only.
19. Psoriasis (on nails)
Meaning: Thick, pitted, flaky nail surface.
Safe? ✔ With caution
Sentence: “Avoid aggressive filing—work gently.”
LBA Tip: Non-infectious.
20. Dermatitis
Meaning: Skin inflammation.
Safe? ✔ Mild only
Sentence: “If it looks inflamed or painful, we should stop.”
LBA Tip: Client comfort.
21. Calluses
Meaning: Thickened skin from pressure.
Safe? ✔ Yes, gently
Sentence: “We smooth calluses, but never cut deeply.”
LBA Tip: Safety first.
22. Corns
Meaning: Hardened skin on toes.
Safe? ✔ Light smoothing
Sentence: “We do not cut corns—only medical professionals can.”
LBA Tip: Light work only.
23. Cracked Heels
Meaning: Dry splits in heel skin.
Safe? ✔ Only if superficial
Unsafe if: bleeding, deep
Sentence: “Bleeding cracks mean stop and refer.”
LBA Tip: Avoid deep cracks.
24. Edema (Swelling)
Meaning: Fluid buildup causing swelling.
Safe? ❌ NO
Sentence: “Swelling means stop service.”
LBA Tip: Immediate stop.
25. Varicose Veins
Meaning: Swollen, twisted veins.
Safe? ✔ Light only
Sentence: “We avoid pressure over varicose veins.”
LBA Tip: Gentle safety.
26. Bruising
Meaning: Broken blood vessels under skin.
Safe? ✔ Avoid touching
Sentence: “We work around bruised areas.”
LBA Tip: Avoid pressure.
🧼 LBA TEST RULE: WHEN TO STOP SERVICE
Stop service immediately if you see:
❌ Pus
❌ Bleeding
❌ Green, yellow, brown discoloration
❌ Thick fungal growth
❌ Open skin
❌ Warts
❌ Extreme lifting
❌ Deep cracks
❌ Swelling
❌ Pain
❌ Strong odor
Say:
“I cannot perform the service today for your safety.”
❤️ LBA HUMANIZATION APPROACH™ — SAFETY IS LOVE
At Louisville Beauty Academy, safety is a form of love and protection.
We teach students:
✔ Care first
✔ Beauty second
✔ Safety always
✔ Never fear saying “No”
✔ Your license is your career
Say it:
YES I CAN™ recognize disorders safely.
YES I CAN™ know when to stop service.
YES I CAN™ protect my clients.
YES I CAN™ protect my license.
Soon I WILL say: I HAVE DONE IT™.”
📝 50 LICENSING-STYLE QUESTIONS — CHAPTER 17
- What is the nail technician’s role with disorders?
- Why must techs avoid diagnosing?
- What is onychomycosis?
- What is tinea pedis?
- Is psoriasis infectious?
- What should tech do if nail is green?
- What is paronychia?
- Why avoid working on warts?
- What is onycholysis?
- Why avoid covering lifted nails?
- What are Beau’s lines?
- What is leukonychia?
- Why avoid deep cracks?
- Why avoid inflamed skin?
- Why avoid working on swollen feet?
- Why avoid working on pus?
- Why is eczema safe with caution?
- What is dermatitis?
- Why avoid filing brittle nails too much?
- Why stop service if bleeding?
- Why avoid aggressive filing on psoriasis nails?
- Why trim only dead hangnails?
- Why must fungal infections be referred?
- What is onychauxis?
- Why choose gentle service for thickened nails?
- Why avoid corns cutting?
- What is pseudomonas infection?
- Why avoid service on green nails?
- Why avoid touching viral lesions?
- Why wear gloves for infections?
- Why disinfect tools?
- Why check for pain during service?
- Why clean and dry nails?
- Why avoid buffing natural nails too thin?
- Why avoid over-softening skin?
- Why avoid treating athlete’s foot?
- Why avoid squeezing inflamed skin?
- Why keep area sanitized?
- Why ensure files are new?
- Why speak kindly when refusing service?
- Why avoid lotions on open skin?
- Why avoid sharing tools?
- Why inspect nails before service?
- Why record unusual findings?
- Why follow state regulations?
- Why avoid covering discoloration?
- Why protect your license?
- Why stop service if client is in pain?
- Why avoid sharp tools near infection?
- What is the LBA mindset for disorders?
📝 ANSWER KEY — CHAPTER 17
- Recognize, not diagnose
- Outside scope
- Nail fungus
- Athlete’s foot
- No
- Stop and refer
- Infection around nail fold
- Contagious
- Nail separating
- Worsens condition
- Grooves from growth disruption
- White spots
- Infection risk
- Sensitivity
- Swelling = stop
- Sign of infection
- Non-infectious
- Skin inflammation
- Prevent breakage
- Blood = stop
- Sensitive surface
- Avoid cutting live skin
- Requires medical treatment
- Thickened nail
- Prevent pain
- Only doctors can cut
- Bacterial “green nail” infection
- Contagious, unsafe
- Viral infections spread
- Protection
- Hygiene
- Safety
- Adhesion + hygiene
- Weakens nail
- Increases sensitivity
- Medical condition
- Painful and unsafe
- Prevent contamination
- Prevent cross-infection
- Professionalism
- Infection risk
- Sanitation
- Safety
- Documentation
- Legal safety
- Could hide disease
- Career protection
- Safety issue
- Spread infection
- YES I CAN™ recognize and refer. YES I CAN™ protect health, safety, and my license.
To access the full announcement and explore all 50 chapters of THE COMPLETE NAIL LICENSING MASTER BOOK, visit:
This book is LBA’s gift to the world — a fully public, free, humanized educational resource built to uplift every learner.
YES YOU CAN.
YES YOU WILL.
YES YOU HAVE DONE IT.
