9.3 Client Safety, Contraindications & Referral

Key Takeaways

  • Every nail service begins with a visual and verbal inspection of the nails, skin, and surrounding tissue — before the client soaks
  • MMA (methyl methacrylate) monomer is unsafe for nail use and is banned for that purpose in many jurisdictions: it bonds too hard, damages the natural nail, and harms skin
  • Metal implements are cleaned and disinfected for reuse; porous items like files and buffers are single-use and discarded after each client
  • Pedicure basins must be cleaned and disinfected between every client, and extra caution applies to clients with diabetes or poor circulation
  • Declining service professionally means stating what you observed, explaining you are not permitted to work on it, recommending a physician or podiatrist, and documenting the refusal
Last updated: August 2026

The Pre-Service Nail Inspection

Safety in nail services is not a reaction to a problem — it is a routine performed before every single service, and the Tennessee exam treats it that way. Before the client's hands or feet touch water, conduct a quick, systematic check:

  1. Look at every nail plate and the surrounding skin: discoloration, thickening, crumbling, lifting, spots, bands, redness, swelling, or broken skin.
  2. Ask the client about recent injuries, illnesses, pain, itching, or anything new they have noticed, and review any client consultation or health-intake form.
  3. Decide: proceed, modify the service (for example, work around a bruised nail), or decline and refer.

Documenting what you observed on the client's record card protects both the client and you, and it demonstrates the professional standard the exam expects.

Contraindications: When You Must Not Work

A contraindication is a condition that makes a service unsafe to perform. For manicures, pedicures, and artificial nails, the hard-stop list includes:

  • Any sign of infection — fungal (onychomycosis, tinea), bacterial (paronychia), or otherwise: redness, heat, swelling, pus, pain.
  • Inflammation of the nail folds or surrounding skin, even before infection is certain.
  • Onycholysis — a lifted nail plate creates a pocket where moisture and pathogens collect.
  • Open cuts, abrasions, or broken skin on the hands or feet, including fresh hangnail tears that are bleeding.
  • Unknown or changing discoloration or pigmentation — a dark band, an unexplained bruise-like mark, or any new spot you cannot attribute to a known minor injury.
  • Contagious skin conditions anywhere in the service area (warts, athlete's foot, ringworm).

Artificial nail services add their own concerns: never apply product over a nail that is green-tinged under a lifting enhancement (a sign of bacterial growth, often Pseudomonas — the so-called "greenie"), over an inflamed nail bed, or on a client reporting a previous allergic reaction to enhancement products.

Infection Control Specific to Nail Services

General salon disinfection rules apply, but nail work has its own specifics that the exam loves:

  • Metal implements — nippers, pushers, clippers — must be cleaned with soap and water first, then disinfected in an EPA-registered bactericidal, virucidal, and fungicidal disinfectant, following label contact time, between every client.
  • Porous items cannot be truly disinfected — nail files, buffers, wooden sticks, and abrasive boards absorb moisture and debris. They are single-use: used on one client and discarded. Never file two clients with the same board.
  • Pedicure basins and foot spas must be cleaned and disinfected between every client, including scrubbing residue, circulating disinfectant through jets and pipes where applicable, and following the disinfectant label, manufacturer instructions, and current Tennessee sanitary rule. A basin that is merely rinsed is a breeding ground for bacterial skin infections — real outbreaks have been traced to contaminated foot spas.
  • Wash your hands before and after every client, and have the client wash or sanitize their hands or feet before the service begins.

Product Chemistry Awareness

Nail enhancement products are chemistry in action, and a handful of exam questions come straight from this material:

  • Acrylic (monomer + polymer): liquid monomer is mixed with powder polymer to form a bead that hardens on the nail. The safe professional liquid is ethyl methacrylate (EMA).
  • MMA — methyl methacrylate: an industrial-strength monomer once used in discount nail services. It creates an unnaturally hard, rigid bond that will not release from the natural nail — instead of the enhancement popping off under stress, the natural nail plate rips away with it. It also bonds to and damages skin, is extremely difficult to file (leading to damaging over-filing of the natural nail), and its use on nails is prohibited or restricted in many jurisdictions. Warning signs at a salon: a very low price, an unusually strong fruity or sharp odor, and enhancements that barely flex. The exam expects you to identify MMA as the unsafe monomer.
  • UV gels: gel products harden (cure) only when exposed to a UV or LED lamp for the specified time. Under-cured gel remains a sensitizer — repeated skin contact with uncured product is a leading cause of allergic contact dermatitis in nail professionals and clients. Keep product off the skin, cure fully, and never touch tacky layers with bare fingers.
  • Primers: nail primers improve adhesion but many are acid-based and corrosive to skin. Apply sparingly to the nail plate only; skin contact can cause burns and sensitization.
  • Ventilation and dust: filing — especially electric filing of enhancements — generates fine dust that should not be inhaled. Work with local exhaust or good general ventilation, consider a dust mask during heavy filing, and wear appropriate protection when handling chemicals for long shifts.

Special Caution: Diabetes and Circulation

Pedicures carry extra risk for clients with diabetes or poor peripheral circulation. Reduced sensation (neuropathy) means the client may not feel water that is too hot or a nick from an implement, and reduced circulation means small wounds heal slowly and can become serious infections. For these clients: test water temperature carefully, avoid cutting cuticles or any living skin, use gentle pressure, never use credo blades or aggressive callus removal, and encourage them to see a podiatrist for any foot problem. If you spot an open sore or wound on the foot of a client with diabetes, do not perform the pedicure — refer them to their physician or podiatrist.

Declining Service and Referring Professionally

The exam tests not just whether you refuse but how:

  1. Stay private and calm. Move the conversation away from other clients.
  2. State the observation, not a diagnosis. "I can see redness and swelling around this nail" — never "you have a staph infection."
  3. Explain the rule. "For your safety, I'm not permitted to perform nail services over inflamed or infected skin."
  4. Recommend the right professional. A physician for hands and general concerns; a podiatrist for foot and toenail conditions.
  5. Offer a path back. "Once your doctor has treated it and it has cleared, I'll be glad to book your service."
  6. Document the refusal on the client record: date, what was observed, that service was declined, and that a referral was made. Documentation protects you if a dispute arises later.

Safe vs. Unsafe Client Situations

SituationSafe to service?Correct action
Healthy nails, intact skin, no complaintsYesStandard service with routine disinfection
Brittle nails with ridges (onychorrhexis)Yes, gentlyConditioning care; avoid harsh filing
White spots (leukonychia)YesNormal service; harmless
Red, swollen, painful nail foldNoDecline; refer to physician
Thick, yellow, crumbly toenailNoDecline; refer; disinfect the area
Plate lifted from the bed (onycholysis)NoDecline; refer if cause unknown
New dark band on one nailNoRefer promptly for evaluation
Client with diabetes, feet intactWith cautionLukewarm water, no cutting living skin, gentle technique
Client with diabetes and an open soreNoDecline; refer to podiatrist
Green discoloration under a lifting enhancementNoDo not reapply product; refer for evaluation

Mastering this table means mastering the "client safety" questions on the exam: look, decide, and when anything is infected, inflamed, or unexplained — refer.

Test Your Knowledge

Which item may be reused on the next client after proper cleaning and disinfection?

A
B
C
D
Test Your Knowledge

A new client says a discount salon applied her acrylics, and you notice the enhancements are rock-hard, do not flex at all, and her natural nails are torn where one enhancement caught on a door. The product most likely used was:

A
B
C
D
Test Your Knowledge

A regular pedicure client mentions she has diabetes. Which adjustment is appropriate?

A
B
C
D