Green Discoloration Under a Lifted Gel Overlay
A 22-year-old client returns four weeks after a gel overlay service. The overlay has lifted along the right sidewall, and a green-black discoloration is visible on the natural nail beneath the lift. She has no pain, swelling, or discharge and wants the area filled and covered with nail art before a vacation. The technician's UV lamp is a 36-watt unit with bulbs installed nine months ago; the builder gel label specifies a 60-second cure, but the technician has been curing for 30 seconds to save time. The client swims three times a week and admits she has been picking at the lifted edge. The salon uses one set of reusable carbide bits for all clients and files that are not visibly soiled.
1. What is the most likely cause of the discoloration, and can the technician fill over it? Explain the reasoning and the appropriate service steps.
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The green-black discoloration under a lifted gel overlay is most likely Pseudomonas aeruginosa colonization, often called 'greenies.' It develops when moisture and debris are trapped in a pocket under lifted product. The absence of pain, swelling, and discharge suggests it may be colonization rather than a spreading infection, but the technician cannot diagnose.
The technician should not fill over the area. She should remove the overlay, inspect the natural nail, and avoid applying new enhancement over discolored or separated nail plate. If there is pain, swelling, pus, red streaking, or fever, the client should be referred to a health-care provider. If the nail plate is intact and only stained, the technician may clean and dry the area, advise keeping it dry, and let the stain grow out; product should not be reapplied until the nail is healthy. Document the finding, the referral, and the client's decision.
2. Identify the curing and lamp-maintenance issues and explain how they contribute to lifting.
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The technician is curing a builder gel for 30 seconds when the label requires 60 seconds, which can leave the product undercured. Undercuring leaves unreacted monomers, weakens the overlay, and can cause shrinkage, lifting, and moisture pockets. The lamp bulbs are nine months old, and UV output declines with age even if the bulb still glows; the lamp may not be compatible with the gel's photoinitiators. Dirty reflectors or bulbs also reduce curing energy.
The technician should follow the manufacturer's cure time and lamp specifications, replace bulbs or the lamp as recommended, clean the lamp, use thin and even layers, and cure all five fingers properly. She should also avoid overfiling the natural nail and should not use the client's picking as a reason to apply more product over a lifted edge.
3. What infection-control steps are required for the files, bits, and surface after this service?
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Porous files and buffers that contacted the client should be discarded as single-use items unless the manufacturer explicitly allows cleaning and disinfection. Reusable carbide bits should be cleaned of debris with detergent, then disinfected or sterilized according to the manufacturer's instructions; they should never be shared without processing. The work surface should be cleaned and disinfected with an EPA-registered product, and hand hygiene should be performed before and after glove use.
The salon should also stop using one set of bits for all clients without processing. If the salon cannot demonstrate a consistent clean-to-dirty workflow and a disinfection log, it should revise the procedure before continuing gel services.