MO Esthetician key terms

A microorganism, such as a bacterium, virus, or fungus, that can cause disease. In the salon, pathogens are spread through unclean tools, hands, linens, and contaminated products.

The presence of dirt, oil, bacteria, or other unwanted material on a surface, tool, or product. Contaminated items must be cleaned and disinfected before reuse or discarded.

The lowest level of decontamination: physically removing visible debris and reducing the number of germs on surfaces using soap, water, and detergent. It does not kill all microorganisms.

Using a chemical product to destroy most harmful microorganisms on nonporous surfaces and implements. Disinfection does not kill bacterial spores and is not the same as sterilization.

A process that destroys all microbial life, including bacterial spores, on an object. In skin care settings it is used mainly for items that may contact broken skin or blood.

Treating all blood, body fluids, and potentially infectious materials as if they carry disease. This means wearing gloves and using barriers for every client, not only those who appear ill.

A standardized document supplied with a chemical product that lists its hazards, safe handling, first-aid measures, and disposal instructions. It must be kept accessible to workers.

A disinfecting product that carries a registration number from the U.S. Environmental Protection Agency and has label directions for killing specific germs. Salon implements should be disinfected with one approved for hospital use.

The outermost, avascular layer of the skin. It protects the body, contains melanocytes, and is the layer estheticians treat with surface products and gentle exfoliation.

The thicker layer beneath the epidermis that contains collagen, elastin, blood vessels, nerves, glands, and hair follicles. It supports the skin's strength and supplies nutrients to the epidermis.

The outermost sublayer of the epidermis, made of flattened, keratin-filled dead cells. It limits water loss and is the target of exfoliation and moisturizing products.

A cell in the epidermis that produces melanin, the pigment that gives skin color and helps protect it from ultraviolet radiation. Uneven melanocyte activity can cause dark spots.

An oil-producing gland usually attached to a hair follicle. Its sebum lubricates skin and hair; overactivity contributes to oily skin and comedones.

The slightly acidic film of sebum and sweat on the skin's surface, normally around pH 4.5 to 5.5. It helps discourage harmful bacteria and supports barrier function.

Small, bean-shaped structures that filter lymph fluid and support immune defense. Swollen or tender nodes in the neck or jaw are a reason to avoid facial massage and refer the client.

A six-point classification of skin type based on how skin responds to ultraviolet light, including burning and tanning. Estheticians use it to estimate sun sensitivity and treatment risk.

The area across the forehead and down the nose and chin, where oil glands are often most active. It frequently differs in oiliness from the cheeks.

A pore blocked by sebum and dead skin cells. A closed comedone (whitehead) stays under the skin; an open comedone (blackhead) is exposed to air and darkens.

Excessive production of sebum by the sebaceous glands, leading to oily skin or scalp. It can contribute to acne and seborrheic dermatitis.

A chronic inflammatory skin condition causing flushing, redness, visible vessels, and sometimes bumps on the face. Estheticians avoid aggressive treatments and heat that may trigger flare-ups.

Darkened patches of skin caused by excess melanin, often after sun exposure, inflammation, or injury. Treatment must be gentle because irritation can worsen the discoloration.

A condition or circumstance that makes a treatment unsafe or inadvisable for a client. Estheticians must identify contraindications during consultation and modify, postpone, or decline service.

A client's voluntary agreement to a service after being told its benefits, risks, alternatives, and likely costs. It should be documented with the client's signature before treatment.

A questionnaire that records a client's health history, medications, allergies, past skin reactions, and treatment goals. It supports safe service planning and becomes part of the client record.

A documentation format using Subjective, Objective, Assessment, and Plan. It organizes what the client reports, what the esthetician observes, the analysis, and the next steps.

A light, gliding massage stroke used to begin and end a facial, warm the skin, and apply product. It generally flows in the direction of venous and lymphatic return.

A kneading or compression massage movement that works deeper into muscles and soft tissue. On the face it is applied gently and is avoided over inflamed or infected areas.

An ingredient that attracts and holds water in the skin, such as glycerin or hyaluronic acid. It helps hydrate the outer layers but works best with an occlusive product on top.

An ingredient that softens and smooths the skin by filling gaps between surface cells, such as oils and fatty alcohols. It improves texture and reduces water loss.

A wax that is applied in a thicker layer and removed without a cloth strip. It is often used for sensitive areas because it grips hair firmly and can be less irritating to skin.

A thin wax applied with a spatula and removed using a cloth or paper strip. It is suited to large areas such as legs and arms; strips cannot be reused.

A hair removal method using a paste of sugar, water, and lemon applied against hair growth and removed in the natural direction. It is water-soluble and can be gentler on skin.

The active growth stage of the hair cycle, when hair is connected to the blood supply and most susceptible to waxing or laser treatment. Not all hairs are in this phase at once.

A small application of a product, such as wax or tint, to a discreet area to check for an allergic or irritant reaction before full treatment. Results are read within the time stated on the product label.

A synthetic fiber bonded to a natural eyelash, usually one fiber per lash. Proper isolation and adhesive control protect the eye and prevent unnatural weight or clumping.

A dye applied to eyelashes to darken them temporarily. A patch test and careful eye protection are required because the product can irritate eyes and skin.

The state regulatory body within Missouri's Division of Professional Registration that licenses cosmetologists, estheticians, and related professionals and enforces salon safety rules.

The legally defined services and procedures a licensed esthetician may perform in Missouri, including limits on treatments involving living tissue or medical conditions.

The periodic process of keeping a professional license active by paying renewal fees and meeting any board requirements before the expiration date. Practicing on an expired license violates Missouri rules.

Coverage that protects an esthetician against claims of injury or harm arising from services. It is separate from general business insurance and is often required by employers or landlords.