Green Nail Under Acrylic and a Dark Streak
A 34-year-old client comes for a fill on acrylics applied three weeks ago. On the right index finger, the nail plate has separated from the nail bed distally, and the exposed area is olive-green to dark green. The surrounding skin is not red or swollen, and she has no pain. She says she bumped the nail and that “it’s just a bruise.” She wants you to file off the green, apply a new acrylic, and make it look good because she is a bridesmaid on Saturday. On the left thumbnail, she has a vertical dark brown-black streak that has been present for eight months and has become wider; she denies trauma. She asks whether you can “buff out” the streak, too. She is otherwise healthy and takes no medications.
1. Identify the likely significance of the green discoloration and the dark streak. Can you perform the requested services?
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The green color under a lifted enhancement is not a bruise; it most commonly suggests Pseudomonas colonization, often called green nail syndrome, in the moist space under the lifted product. Filing and covering it would trap moisture and bacteria and could worsen it. I would not apply acrylic over that nail and would refer her to a physician. The vertical dark streak is more concerning: a new or widening longitudinal pigmented band can be subungual melanoma and requires medical evaluation, not buffing. A nail technician cannot diagnose either condition. I can explain the findings in neutral language, decline both requests, and offer to service only nails that are intact-if cross-contamination is controlled. The key is that the color and history are red flags, not cosmetic problems.
2. What infection-control steps apply to the implements and workstation after this client?
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Because the green nail may involve bacteria, I would treat all implements that touched it as contaminated. Metal tools get cleaned, then immersed in an EPA-registered hospital-grade disinfectant for the label contact time. Files, buffers, and any porous items that touched the nail are discarded-not reused. I would change gloves, wash hands, and clean the table surface. I would not use the same file on her other nails or on the next client. If I service unaffected nails, I use a separate set or disinfect between clients. The reasoning is standard precautions: I do not need a confirmed diagnosis to use barriers and disinfection; I assume potentially infectious material and prevent transfer.
3. How would you explain the referral without diagnosing or alarming the client?
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I would use plain, non-diagnostic language: “I see a color change under the lifted nail and a dark band on your other thumb that I’m not able to treat in the salon. These need a doctor’s evaluation before I can safely apply a new set.” I would avoid saying “you have an infection” or “that is melanoma.” I would emphasize that this is a boundary of my license, not a judgment about her. I would offer to reschedule the other nails if she wants and give her a written note of the date and the nails I observed. The reasoning is to inform without diagnosing, preserve trust, and make a clear referral.