3.3 Nail Disorders, Diseases & Contraindications
Key Takeaways
- Nail technicians are legally mandated under Oregon rules to refuse service and refer clients to a physician for any contagious disease or inflamed skin.
- Non-contagious disorders like onychophagy, leukonychia, and hangnails can be serviced in the salon with appropriate care.
- Onychomycosis (tinea unguium) is a contagious fungal infection requiring immediate service refusal and medical referral.
- Pseudomonas aeruginosa is a bacterial infection causing green/black discoloration beneath lifted enhancements, incorrectly called 'nail mold'.
- Paronychia is a bacterial infection of the tissue surrounding the nail characterized by redness, swelling, pus, and throbbing pain.
3.3 Nail Disorders, Diseases & Contraindications
Exam Focus & Core Concept: Distinguishing between non-contagious nail disorders and contagious nail diseases is one of the most critical responsibilities of a licensed nail technician in Oregon. Under Oregon Administrative Rules (OAR Chapter 817), nail technicians are strictly prohibited from diagnosing or treating medical conditions. When a contagious disease or severe inflammation is present, service MUST BE REFUSED (contraindicated), and the client referred to a physician.
1. Oregon State Board Scope of Practice & Service Refusal Rules
Oregon law establishes strict boundary lines regarding client safety and disease prevention in salons:
- Scope of Practice: Nail technicians perform cosmetic services to clean, shape, polish, and enhance natural and artificial nails. Technicians CANNOT diagnose medical conditions, prescribe treatments, or cut living tissue.
- Mandatory Service Refusal (Contraindication): If a client presents with any sign of infection, contagious fungal/bacterial/viral disease, open wound, swelling, redness, or pus exudate around the nail unit, the technician MUST REFUSED SERVICE. The technician should calmly inform the client of the visual observation and recommend consultation with a dermatologist or podiatrist.
- Sanitation Compliance: Performing services on an infected nail risks cross-contaminating salon implements, foot basins, and subsequent clients, constituting a major violation of Oregon Health Licensing Office rules.
2. Non-Contagious Nail Disorders (Salon Care Allowed with Caution)
Nail disorders are non-infectious conditions caused by injury, heredity, or systemic factors. If the surrounding skin is healthy and unbroken, manicurists may service these clients using gentle techniques.
| Condition Name | Technical Description | Underlying Etiology / Cause | Salon Protocol & Oregon Rule |
|---|---|---|---|
| Onychophagy | Severely bitten nails | Habitual biting of nail plate and eponychium | Service allowed if skin is unbroken; enhancements can discourage biting. |
| Leukonychia | White spots or streaks on plate | Minor injury to nail matrix; air pockets trapped in keratin | Service allowed; condition grows out naturally with nail plate. |
| Beau's Lines | Horizontal transverse depressions | Temporary halt in matrix cell division due to severe illness/fever | Service allowed; surface can be gently buffed; avoid heavy pressure. |
| Hangnail (Agnail) | Tear in skin surrounding nail fold | Dry skin, aggressive filing, or cuticular tearing | Trim dead skin tags ONLY with sanitized nippers; NEVER cut living skin. |
| Eggshell Nails | Thin, white, exceptionally flexible nails | Heredity, improper diet, or nervous disorders | File gently with fine-grit file (240+ grit); avoid heavy acrylic weight. |
| Onychorrhexis | Longitudinal ridges and splitting | Matrix injury, chemical exposure, or aging | Service allowed; hydrate with cuticle oil; use ridge-filling base coats. |
| Melanonychia | Dark band of pigment along plate | Increased melanocyte activity; common in dark skin tones | Service allowed if long-standing; refer to doctor if sudden change occurs. |
| Splinter Hemorrhages | Red/brown vertical lines under plate | Damage to nail bed capillaries from trauma or systemic issue | Service allowed; non-contagious; monitor for progression. |
| Onychocryptosis | Ingrown nail (border grows into tissue) | Improper filing, tight footwear, or curved nail plate | If uninfected, round borders gently; if inflamed/pus present -> REFUSE SERVICE. |
3. Contagious Diseases & Severe Pathologies (STRICT SERVICE REFUSAL)
Contagious diseases are caused by infectious biological agents (fungi, bacteria, viruses). Applying nail services over contagious conditions can spread pathogens to the technician and other clients, worsen tissue damage, and violate Oregon law.
Detailed Pathology of Infectious Diseases
- Onychomycosis (Tinea Unguium): A fungal infection of the nail plate. Symptoms include yellow/green discoloration, thickening, crumbling free edge, and separation from the nail bed. Fungal spores thrive in dark, warm, moist environments. STRICT CONTRAINDICATION.
- Tinea Pedis (Athlete's Foot): Fungal infection of the foot skin, characterized by red, scaling, itchy rash and watery blisters between toes. STRICT CONTRAINDICATION for pedicure services.
- Paronychia: Bacterial inflammation of the tissues surrounding the nail plate (perionychium/eponychium). Characterized by severe erythema (redness), edema (swelling), throbbing pain, and purulent exudate (pus). Often caused by Staphylococcus aureus entering through cut living eponychium. STRICT CONTRAINDICATION.
- Pseudomonas Aeruginosa (Bacterial Infection): Frequently mislabeled by technicians as "nail mold." It is a bacterial infection that thrives in moist, anaerobic pockets created when acrylic or gel enhancements lift from the natural nail plate. The bacteria feed on moisture and cellular debris, excreting greenish-black pigment waste (pyocyanin). If uninfected skin, remove enhancement, cleanse, and allow to dry completely. If tissue is broken, raw, or swollen, REFUSE SERVICE and refer to a doctor.
- Felon (Whitlow): Severe, deep bacterial infection of the distal phalanx finger pad. Characterized by extreme throbbing pain, swelling, and deep pus accumulation. Requires emergency medical drainage. STRICT CONTRAINDICATION.
- Onychia: Inflammation of the nail matrix followed by shedding of the entire natural nail plate. STRICT CONTRAINDICATION.
- Onycholysis: Lifting of the nail plate from the nail bed without falling off. Caused by trauma, allergic reaction, or infection. Service cannot be performed over lifted areas until cause is resolved.
- Onychomadesis: Spontaneous separation and falling off of a nail plate starting from the matrix area. STRICT CONTRAINDICATION.
State Board Exam Trap: If a client presents with green discoloration under a lifted gel nail, remember that it is caused by Pseudomonas aeruginosa bacteria, NOT mold or fungus! Mold does not grow on human nails.
Under Oregon Administrative Rules (OAR Chapter 817), what is the mandatory action for a nail technician when a client presents with signs of onychomycosis?
What bacterial pathogen causes greenish-black discoloration beneath lifted nail enhancements, frequently misidentified as 'nail mold'?
Which of the following nail disorders is characterized by white spots or streaks on the nail plate caused by minor matrix trauma?
What is paronychia?