Green Discoloration Under an Acrylic Enhancement
A client has worn acrylic nails continuously for six months with fills every three weeks. She presents with lifting on the right index finger and a green-black discoloration of the nail plate beneath the enhancement. The nail plate is separated from the nail bed at the distal edge, there is a slight odor, and the surrounding skin is not red or swollen. She reports no pain. She wants a fill and says, 'Just put a darker color over it - I have a wedding Saturday.' The technician has a bottle of 'fungal nail cure' on the shelf and considers selling it. The salon uses a file, buffer, nippers, and an electric drill with a reusable bit. The client denies any medical conditions and has no known allergies.
1. What is the likely cause of the green-black discoloration, and should the technician diagnose and treat it?
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The most likely cause is Pseudomonas aeruginosa colonization, often called 'green nail syndrome,' not a true fungal infection. The green color comes from pyocyanin pigment produced by the bacteria. It thrives in a dark, moist, anaerobic pocket created when an enhancement lifts and water gets trapped between the acrylic and the nail plate. The onycholysis (separation) gives it space to grow.
The technician must not diagnose or treat this as a fungus. A cosmetologist or nail technician can recognize signs and refer, but diagnosis and medication are outside scope. Selling a 'fungal cure' would be both inaccurate and a drug claim. The client needs a physician or dermatologist, especially because bacterial infection can spread and because the nail plate may need topical or oral treatment.
2. What can the technician do today, and what should she tell the client?
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Today:
- Do not apply a new enhancement over the discoloration. Covering it traps moisture and bacteria.
- Remove the acrylic gently without scraping or thinning the nail plate. Do not use the drill aggressively on the discolored area.
- Discard porous items - file, buffer, and any wooden stick - in a sealed bag.
- Disinfect reusable implements - nippers and drill bit - after cleaning, using an EPA-registered hospital disinfectant at the label dilution and contact time. The drill bit must be cleaned before disinfection.
- Cleanse the area and advise the client to keep it dry and see a physician before any new enhancement.
Tell her: 'The green color is likely bacteria under the lifted acrylic. I can't diagnose or treat it, and covering it would make it worse. Please see a doctor; once it's cleared, we can talk about a safe new set.' Do not promise a cure or sell a treatment product.
3. How should the technician handle the reusable drill bit and the salon's disinfection routine?
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The drill bit is a reusable, nonporous item and must be cleaned and then disinfected between clients. If the salon claims sterilization, it must clean first and use a validated sterilizer with monitoring. Disinfection alone does not kill all bacterial spores, but it is the standard for nail implements.
The routine should include:
- A dirty-to-clean workflow: used implements go into a labeled container, never back on the cart.
- Visible debris removed with detergent and a brush before immersion in disinfectant.
- Full immersion at the correct dilution for the full label contact time; a quick spray is not enough.
- Disinfectant changed when visibly soiled or at the manufacturer's interval, and tested with strips if required.
- Porous items - files, buffers, wooden sticks - are single-use or given to the client; they cannot be disinfected.
Document the disinfection log and train all staff. The client's wedding is not a reason to skip the process; an infection can worsen and cause permanent nail plate damage.