4.0 Nail Care and Services Cosmetology Practice Quiz

• A. Onycholysis, where the nail plate separates from the nail bed beginning at the free edge
• B. Paronychia, an infection of the skin surrounding the nail plate
• C. Onychoschisis, a condition in which the nail plate splits or peels horizontally in layers, often caused by repeated wetting and drying, excessive use of nail products, or nutritional deficiencies
• D. Koilonychia, in which the nail plate becomes concave and spoon-shaped

Onychoschisis (also called lamellar dystrophy) is the horizontal splitting or peeling of the nail plate in layers at the free edge; the nail plate layers separate from each other due to the disruption of the bonds between the nail plate layers, commonly caused by repeated immersion in water followed by drying, use of harsh nail products, acetone overexposure, or nutritional deficiencies; it presents exactly as described with thin, peeling, easily broken nails.

• A. Trim the plantar wart with a nail nipper as part of the pedicure service to remove it and prevent it from growing larger
• B. Decline to perform any pedicure service, explain that plantar warts are caused by human papillomavirus (HPV) which is highly contagious and can spread through salon equipment and moisture in the foot bath, and refer the client to a physician for treatment
• C. Apply a salicylic acid corn and callus remover product to the wart and proceed with the pedicure after the product is rinsed off
• D. Perform the full pedicure, avoiding direct contact with the wart, and disinfect the area afterward with an EPA-registered spray disinfectant

Plantar warts are caused by HPV (human papillomavirus); the virus is transmitted through direct contact with infected tissue or contaminated surfaces and thrives in warm, moist environments such as pedicure basins and foot baths; the service must be declined, and the client should be referred to a physician for appropriate medical wart treatment; this protects other clients and the cosmetologist from HPV exposure through contaminated water, implements, and surfaces.

• A. Apply a nail treatment containing antifungal ingredients from the retail shelf and proceed with the service after allowing it to absorb
• B. Proceed with the service on all other nails and simply avoid that one nail; the discoloration is cosmetic and does not represent a health concern
• C. Decline to perform any nail service and recommend the client consult a physician, as yellow-green discoloration combined with nail plate separation may indicate a bacterial or fungal nail infection that contraindicates professional nail services
• D. Apply an acrylic nail enhancement over the discolored nail to seal the area and prevent spread to other nails during the service

Applying an acrylic enhancement over an infected nail seals in the infectious agent in a warm, moist environment that promotes proliferation of bacteria or fungi; it does not prevent spread and worsens the underlying condition while creating an instrument for transmitting pathogens to implements and products.

• A. Clients with diabetes can receive standard pedicure services without any modification because diabetes does not affect nail or foot health
• B. Clients with diabetes may have peripheral neuropathy (reduced sensation in the feet), impaired wound healing, and reduced circulation; extreme caution must be used to avoid any cuts, abrasions, or skin breaks, instruments must be used gently, cuticle cutting is often contraindicated, hot water and extreme temperatures should be avoided, and any wound or skin break requires immediate appropriate care and physician referral
• C. Clients with diabetes should not receive any cosmetology services of any kind under any circumstances
• D. Clients with diabetes should receive pedicures only with higher water temperatures to improve circulation in the feet

Higher water temperatures are contraindicated for clients with diabetic peripheral neuropathy; reduced sensation means the client cannot accurately perceive water temperature, creating a serious burn risk; warm (not hot) water is the appropriate recommendation.

• A. Recommend nail tips applied at the natural free edge, combined with an acrylic or gel overlay that extends the nail length; this creates additional length beyond the natural nail bed and, through the light transmission and surface reflection of the enhancement product, creates the visual impression of an elongated nail bed
• B. Recommend a deep, dark nail polish color applied to the full nail surface to visually shorten the nail and balance the short nail bed
• C. Recommend trimming the existing free edge as short as possible before applying a nude or pale polish to make the nail bed appear as large as possible
• D. Recommend a wide, rounded nail shape that extends maximally from side wall to side wall to create the widest possible nail plate surface

Nail tips applied at the free edge followed by a gel or acrylic overlay extend the visible nail length beyond the natural free edge; the light-transmitting and slightly translucent character of nail enhancement products allows the underlying nail bed's pink color to show through in a way that blurs the visual boundary between natural nail bed and enhancement, creating the appearance of a longer nail bed; additionally, selecting a nail shape (such as oval or almond) that elongates the silhouette and applying a nude or light pink enhancement reinforces the illusion of greater nail bed length.

• A. Nail pitting in psoriasis clients is caused by the psoriasis medications weakening the nail matrix, producing thin spots that become pits as the nail grows
• B. Nail pitting occurs in psoriasis because the nails are bitten habitually by clients with psoriasis, which produces the pitted surface texture
• C. Psoriasis can affect the nail matrix, where cells responsible for producing the nail plate are disrupted by the underlying inflammatory and autoimmune process; the resulting focal areas of parakeratosis (abnormal keratinization) in the matrix produce small defects in the nail plate surface that appear as pits when those cells are shed as the nail grows forward
• D. Nail pitting in psoriasis is caused by repeated exposure to water during the psoriasis skin care regimen, which softens the nail plate and allows physical compression to create surface depressions

Nail pitting is not caused by habitual nail biting; nail biting (onychophagia) produces different nail changes (irregular, shortened nails with damaged cuticles and lateral edges) rather than the regular geometric pitting pattern seen in psoriatic nail disease.

• A. Chemotherapy causes nails to become permanently straighter and harder, making enhancement adhesion impossible without special priming agents
• B. Chemotherapy frequently causes onycholysis (nail plate separation), nail fragility, beau's lines, and in some protocols causes nail loss; the compromised nail plate provides a poor adhesion surface, the periungual tissue is more susceptible to infection, and applying nail products over already-compromised nails can further damage the nail structure and create infection portals, physician clearance is recommended before providing nail enhancements
• C. Chemotherapy causes excess keratin production in the nail matrix, making nails too thick for standard enhancement application techniques
• D. Chemotherapy has no documented effects on nail health; the contraindication concern is purely cosmetic, the nail enhancements may not match the client's changed hair color after chemotherapy treatment

Chemotherapy has well-documented effects on nail health including onycholysis, fragility, and growth disturbances; the contraindication is clinically based on nail health compromise and infection risk, not on cosmetic color-matching concerns.

• A. Mees' lines are permanent structural changes in the nail matrix caused by repeated mechanical trauma from professional nail services and indicate the need for a 3-month rest period from all nail enhancements
• B. Mees' lines (true leukonychia striata) are transverse white bands that reflect a systemic metabolic disturbance during the period when that section of the nail plate was being produced; historically associated with arsenic poisoning, they are now recognized as markers of any significant physiological stress including severe illness, nutritional deficiency, chemotherapy, or renal failure, their position along the nail plate can help estimate when the systemic event occurred
• C. Mees' lines are caused by excessive application of ridge-filling base coat that penetrates the nail plate and creates white horizontal striations within the nail structure
• D. Mees' lines appear exclusively in clients with vitamin C deficiency (scurvy) and resolve immediately with vitamin C supplementation without any additional cosmetology service modification

Mees' lines are not caused by professional nail services; they are systemic markers produced by physiological disruptions to nail matrix keratinization during the period when the affected portion of the nail was formed, they cannot be prevented by rest periods from nail enhancements.