Masks, Exfoliation & Extractions

Two Kinds of Exfoliation

Exfoliation is the removal of dead surface cells (corneocytes) from the stratum corneum to brighten, smooth, and improve product penetration. The exam divides it into two families:

• Mechanical (physical) exfoliation — physically scrubs or abrades dead cells: granular scrubs, brushing machines, microdermabrasion (aluminum-oxide crystals or diamond tips), and gommage (a "roll-off" cream).
• Chemical exfoliation — dissolves the bonds between cells using acids or enzymes: AHAs, BHA, and enzyme peels.

Chemical Exfoliants You Must Know

AHAs (alpha hydroxy acids) are water-soluble acids derived from foods. The most tested are glycolic acid (from sugarcane, smallest molecule, deepest AHA penetration) and lactic acid (from milk, also hydrating). AHAs work on the surface and suit dry, sun-damaged, and pigmented skin.

BHA (beta hydroxy acid) is salicylic acid. Because it is oil-soluble, it penetrates into the sebum-filled follicle, making it ideal for oily and acne-prone skin and blackheads.

Enzyme peels use proteolytic enzymes — papain (from papaya) and bromelain (from pineapple) — to gently digest dead protein. They are the mildest chemical exfoliant and the best choice for sensitive skin.

Scope rule: in Texas an esthetician performs superficial peels only. Professional light peels are generally AHAs/lactic at 30% or less and enzymes. Medium and deep peels (Jessner's at strength, high-percentage TCA, phenol) are medical procedures outside the esthetics scope.

Matching the Mask to the Skin

A mask delivers concentrated ingredients during the treatment phase. The exam constantly asks you to match mask to skin type:

• Clay / mud masks — contain kaolin or bentonite; absorb oil and draw out impurities → oily/acne-prone skin.
• Cream masks — emollient and occlusive → dry, mature skin.
• Gel masks — soothing, hydrating, often with humectants → sensitive or dehydrated skin.
• Enzyme masks — gentle exfoliation → sensitive or dull skin.
• Paraffin masks — warm wax that seals in product and boosts penetration and circulation → dry/aging skin (avoid on couperose or sensitized skin).
• Modelage / setting masks — thermal masks that harden and warm to push in treatment serums.

Clay masks should not be left to crack fully dry on sensitive or dehydrated skin, because over-drying irritates the barrier — a frequent distractor.

Extractions — Safe Technique

Extraction is the manual removal of comedones (clogged follicles): open comedones = blackheads, closed comedones = whiteheads. Rules tested on the exam:

1. Extract only after steam has softened the follicle.
2. Apply an antiseptic to the skin first to reduce surface bacteria.
3. Wrap fingers in sterile cotton or use disposable gloves; apply gentle, even pressure around (not directly on) the lesion.
4. Limit extraction time to about 10 minutes to avoid trauma and erythema.
5. Never force a lesion that does not release, and never extract inflamed cystic or pustular acne — refer to a dermatologist.

For stubborn comedones, a lancet may be used to nick the surface only where state rules allow; a used lancet is a single-use sharps item discarded immediately into a sharps container. Avoid extractions on clients taking blood thinners or isotretinoin, where bleeding and tearing risks are high.

Mechanical Exfoliation in Depth

Microdermabrasion is a mechanical exfoliation that sprays fine aluminum-oxide crystals (crystal systems) or uses a diamond-tipped wand to abrade and vacuum away dead cells. It is a superficial treatment estheticians may perform; it is contraindicated on active acne, rosacea, fragile or thinned skin, and clients on isotretinoin. Gommage is a roll-off cream that, once partially dried, is rubbed off and carries dead cells with it — a gentler mechanical option. Brushing machines (rotating brushes) lightly exfoliate and deep-cleanse but should be used carefully on couperose or sensitive skin.

A frequent exam contrast: mechanical exfoliation physically removes cells, while chemical exfoliation dissolves the "glue" (desmosomes) holding cells together. Both can over-exfoliate if combined or overused, damaging the barrier.

The Acid Mantle and pH

Chemical exfoliants work by lowering surface pH. The skin's acid mantle sits around pH 4.5–5.5; professional cleansers are typically formulated pH 4.5–6.5 to protect it. Acids exfoliate effectively only at a low pH, which is why post-peel neutralizing and toning restore balance. Over-acidifying or leaving an acid on too long causes irritation, stinging, and barrier damage — outcomes the exam frames as mistakes to avoid.

Histamine, Erythema, and Aftercare

Extractions and exfoliation produce mild erythema (redness) and can trigger a histamine response. Apply a cool, soothing product or gel mask afterward, follow with calming serum, and protect with SPF. Tell the client to avoid heat, sun, additional actives, and picking for 24–48 hours. Recommending an at-home scrub the same night as a professional peel is a wrong answer — it stacks exfoliation and damages the barrier.

Why It Matters for the Exam

Expect items that (1) classify an exfoliant as AHA, BHA, enzyme, or mechanical; (2) match a mask to a skin type; (3) order extractions correctly after steam; and (4) flag when not to extract (cystic acne, isotretinoin, blood thinners). Knowing solubility — AHA water-soluble, BHA oil-soluble — the acid-mantle pH range, and the superficial-peel scope limit will resolve most distractors.