NV Cosmetology common mistakes
NV Cosmetology · Understand the traps and how to avoid them.
Treating disinfectants as interchangeable and soaking implements in whichever bottle is closest, without checking whether the label lists the specific organism (bacteria, fungi, and in Nevada also HIV/HBV claims) and without timing the immersion.
Candidates memorize the word 'disinfectant' as a single category and study the EPA registration concept only in the abstract, so under exam pressure they pick any product described as a disinfectant. They also conflate sanitizing, disinfecting, and sterilizing because the three are taught together in one chapter.
What to do instead
Build a three-row table - sanitize, disinfect, sterilize - with the tool type, product class, and required contact time in each row. For every practice item, first name the level of kill the question is asking for, then eliminate any answer that names a product from the wrong row. Memorize that implements contacting blood or body fluids require a hospital-grade tuberculocidal disinfectant and that porous items that cannot be disinfected are discarded.
Describing hand washing, tool handling, and station set-up in the right order but skipping the intermediate step of cleaning (soap and water) before disinfection, and skipping removal of hair and debris from implements first.
The disinfection step is the memorable one, so candidates jump from 'used implement' straight to 'soak in disinfectant.' The exam deliberately tests the full sequence because a dirty implement will not disinfect properly.
What to do instead
Practice reciting the chain as a fixed script: wash hands, wear gloves, remove visible debris, wash with soap and water, dry, then fully immerse in disinfectant for the labeled time, then store in a clean covered container. When a question asks 'what should the licensee do first,' look for the earliest step in that chain rather than the most technical one.
Answering Nevada law questions using the rule from another state or from general textbook practice, and confusing the roles of the Nevada State Board of Cosmetology, the licensee, and the salon owner.
Most study material is national, and the Nevada-specific hours, fees, license categories, and renewal cycles are a small slice of it. Candidates also assume that what a textbook calls best practice is legally required in Nevada.
What to do instead
Keep a one-page Nevada-only sheet covering license types and their scope, required training hours, renewal and continuing education obligations, display requirements, salon sanitation and inspection authority, and the disciplinary process. For each practice question, ask 'is this a Nevada rule or a general practice standard?' and answer with the Nevada rule when the stem cites Nevada law. Verify every number against the current Board statutes and regulations rather than a third-party summary.
Mixing up the three growth stages of hair and the structures of the follicle and skin layers, and applying the wrong layer to a service question (for example, treating the dermal papilla as the source of the hair's outer cuticle).
The vocabulary is dense and similar-sounding, and candidates memorize definitions in isolation without linking each structure to the service that depends on it. The exam tests structure-to-service links rather than definitions.
What to do instead
Draw the follicle once from memory with labels: bulb, papilla, matrix, medulla, cortex, cuticle, sebaceous gland, arrector pili. Next to each label write the service implication - which layer holds pigment, where curl pattern is set, why a patch test matters. Do the same for the epidermis, dermis, and subcutaneous layer, and for the nail plate, bed, matrix, and cuticle.
Choosing a strong scalp treatment or vigorous shampoo technique for a client described as having an abrasion, a contagious scalp condition, or an irritated scalp, instead of recognizing the contraindication.
Candidates focus on matching the product to the hair type and overlook the health screening step. Exam stems bury the contraindication in a single phrase, such as 'small open sore' or 'recently had a reaction.'
What to do instead
Before answering any service question, scan the stem for red-flag words: open sore, abrasion, inflammation, redness, pus, rash, allergic reaction, pregnancy, prescription medication. If one appears, look first for the answer that refers the client out or postpones the service. Practice by writing the referral answer before reading the options.
Applying a haircut or hair-shaping answer based on the desired look rather than on the stated distribution, elevation, and guideline, and confusing blunt, graduated, and layered results.
Candidates visualize the finished style and pick the option that looks right, ignoring the technical parameters in the stem. The exam intentionally describes the same style achieved by different sectioning and elevation.
What to do instead
For every haircutting item, write down three things from the stem before looking at the options: section, elevation or projection, and guideline type. Then predict the weight line and length progression. Drill the four basic forms - solid, graduated, layered, and increased-layered - and the elevation that produces each, until the prediction is automatic.
Miscalculating developer volume and lift in lightening questions, and forgetting that color does not lift color, so retouching mid-lengths and ends with a lightener or high-lift formula produces unwanted warmth or breakage.
The underlying pigment and developer math is the hardest quantitative content on the exam, and candidates memorize volume numbers without connecting them to the number of levels of lift and to the tone deposited. They also skip the predisposition and patch test steps.
What to do instead
Memorize a lift-to-developer table and the underlying pigment at each level (red, red-orange, orange, yellow-orange, yellow, pale yellow). For each practice item, state the starting level, target level, and levels of lift, then choose the developer. Always apply the rule that lightener or high-lift color goes on the new growth only, and rehearse the patch test and strand test sequence as a fixed script.
Treating a relaxer and a permanent wave as mirror-image services and applying the same processing, rinsing, and neutralization logic to both, or recommending a relaxer over previously relaxed hair.
Both are thio-based and both are taught as 'chemical texture services,' so the two procedures blur together. Candidates forget that relaxing breaks disulfide bonds permanently and requires no neutralizer, while waving rebuilds bonds and requires one.
What to do instead
Write a side-by-side comparison: bond action, product pH, processing time, rinsing, neutralization or lack of it, and the rule against overlapping relaxer on previously relaxed hair. Then drill the safety sequence shared by both - patch test, strand test, protective cream, gloves, timed processing, thorough rinsing - so those answers are never in doubt.
Answering braiding, wig, and hair addition questions as pure styling questions and missing the tension, anchoring, and scalp-health implications, including the risk of traction damage and the need to cleanse and service the natural hair under a wig or extensions.
These services are often studied last and treated as low-risk, so candidates do not connect them to sanitation and anatomy content. The exam cross-tests them against scalp health and infection control.
What to do instead
For each braiding or extension scenario, ask three questions: is the tension safe for the follicle, is the anchoring secure without pulling, and is the client's own hair and scalp being maintained. Review the signs of traction alopecia and the sanitation rules for shared tools and for wigs that touch the client's scalp. Link each answer back to the anatomy domain.
Skipping the client-consultation and record-keeping step in service scenarios and answering business items with marketing instincts rather than the regulatory and professional standard.
Candidates see consultation and documentation as soft content and spend their study time on technical procedures. The exam, however, builds questions in which the correct answer is the one that documents, discloses, or refers.
What to do instead
Adopt a default answer order for scenario questions: screen and consult, disclose and obtain consent, perform within scope, document, then follow up. Review Nevada requirements for client records, service pricing disclosure, and the limits of what a licensee may do for a client with a contraindication. When two options both seem reasonable, choose the one that protects the client and creates a record.