← Skin & Scalp Care – Texas Cosmetology State Board Exam

Texas Cosmetology State Board Exam Study Guide

Key concepts, definitions, and exam tips organized by topic.

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Skin & Scalp Care – Texas Cosmetology State Board Exam Study Guide


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Overview


Skin and scalp care is a core competency on the Texas Cosmetology State Board Exam, covering anatomy, pathology, treatment procedures, product science, and sanitation protocols. Cosmetologists must be able to identify skin and scalp conditions, perform appropriate services, recognize contraindications, and maintain proper safety standards. This guide organizes all key concepts to maximize your exam readiness.


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Skin Anatomy & Physiology


The Layers of the Skin


The skin is the body's largest organ and is divided into primary layers, each with distinct functions.


  • • Epidermis – The outermost layer of the skin; acts as a protective barrier; contains no blood vessels
  • • Dermis – The layer directly beneath the epidermis; contains collagen fibers, elastin fibers, nerve endings, hair follicles, and sweat glands
  • • Subcutaneous layer (hypodermis) – The deepest layer; composed of fat and connective tissue; provides insulation and cushioning

    • Layers of the Epidermis (Deepest to Outermost)


    | Layer | Key Function |

    |---|---|

    | Stratum Germinativum (Stratum Basale) | New cell production via mitosis; contains melanocytes |

    | Stratum Spinosum | Supports structure; cells begin to flatten |

    | Stratum Granulosum | Cells begin to die; keratin production begins |

    | Stratum Lucidum | Found only on palms and soles; transitional layer |

    | Stratum Corneum | Outermost layer; composed of dead, keratinized cells |


    Key Physiological Concepts


  • • Melanin – Pigment produced by melanocytes in the stratum germinativum; responsible for skin color and UV radiation protection
  • • Sebum – Oil produced by sebaceous glands; lubricates the skin and hair
  • • Acid mantle – A thin protective film formed by sebum and sweat; normal pH is 4.5 to 5.5 (slightly acidic); protects against bacteria and environmental damage
  • • Collagen – Provides skin firmness and structure
  • • Elastin – Provides skin elasticity and flexibility

    • Key Terms

  • • Epidermis – Outermost skin layer; no blood vessels
  • • Dermis – Middle layer; contains support structures
  • • Stratum Germinativum – Cell production layer
  • • Melanin – UV-protective pigment
  • • Acid Mantle – Protective skin film; pH 4.5–5.5
  • • Sebum – Oil produced by sebaceous glands

    • ⚠️ Watch Out For

    > The acid mantle has a slightly acidic pH of 4.5–5.5 — do not confuse with neutral (7.0) or alkaline. Many exam questions test whether you know that disrupting this pH harms the skin's protective barrier.


    > The stratum germinativum is where new cells are born, but the stratum corneum is what you see and touch. Know both ends of the epidermal spectrum.


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    Skin Types & Conditions


    The Four Basic Skin Types


    | Skin Type | Characteristics |

    |---|---|

    | Normal | Balanced moisture and oil; small pores; smooth texture |

    | Oily | Excess sebum; enlarged pores; shiny/greasy appearance |

    | Dry | Lack of moisture or oil; tight feeling; fine lines; flaking |

    | Combination | Oily in the T-zone (forehead, nose, chin); dry or normal on cheeks |


    Common Skin Conditions


  • • Seborrhea (Oily Skin) – Overactive sebaceous glands; enlarged pores; prone to comedones
  • • Comedone – Clogged hair follicle filled with sebum and dead cells

    • - Open comedone = Blackhead (exposed to air; oxidized)

    - Closed comedone = Whitehead (covered by skin)

  • • Milia – Small, white, benign keratin cysts trapped beneath the skin; NOT a comedone; require careful extraction or physician referral
  • • Rosacea – Chronic condition; characterized by redness, telangiectasia (visible capillaries), and sensitivity; primarily affects the central face (cheeks, nose); no cure — management only
  • • Seborrheic Dermatitis – Red, flaky, itchy patches; can affect scalp and face; may require physician referral
  • • Psoriasis – Autoimmune condition causing thick, red, scaly patches; must refer to physician

    • Key Terms

  • • Comedone – Clogged follicle; open (blackhead) or closed (whitehead)
  • • Milia – Trapped keratin cysts; benign
  • • Rosacea – Chronic redness and capillary visibility
  • • Telangiectasia – Visible dilated capillaries
  • • Seborrheic Dermatitis – Red, itchy, flaky skin/scalp condition

    • ⚠️ Watch Out For

    > Milia vs. Comedone is a classic exam trap. A milia is a keratin cyst — it is not a clogged pore. A comedone involves sebum and dead cells in a hair follicle. Know the difference.


    > Rosacea clients should never receive services that cause heat, heavy friction, or stimulation — these worsen the condition.


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    Scalp Care & Conditions


    Common Scalp Conditions


    | Condition | Description | Cosmetologist Action |

    |---|---|---|

    | Pityriasis Capitis Simplex | Dry dandruff; small, white, loose flakes | May perform service; use appropriate treatment |

    | Pityriasis Steatoides | Oily, severe dandruff; greasy, sticky scales | May perform service with caution |

    | Tinea Capitis | Fungal infection (ringworm) of the scalp; highly contagious | Refuse service; refer to physician |

    | Pediculosis Capitis | Head lice infestation; highly contagious | Refuse service; refer to healthcare provider |

    | Seborrheic Dermatitis | Red, flaky, itchy scalp patches | Refer if severe |


    Scalp Treatments


  • • Dry scalp treatment – Use products containing emollients and humectants to restore moisture and reduce flaking
  • • Oily scalp treatment – Use lightweight, clarifying products to reduce excess sebum without over-stripping
  • • Scalp massage – Stimulates blood circulation, relaxes the client, promotes sebaceous gland activity, and maintains a healthy scalp environment

    • Key Terms

  • • Tinea Capitis – Fungal scalp ringworm; refer out
  • • Pediculosis Capitis – Head lice; refuse service
  • • Pityriasis Capitis Simplex – Dry dandruff
  • • Pityriasis Steatoides – Oily, sticky dandruff
  • • Seborrheic Dermatitis – Red, scaly scalp inflammation

    • ⚠️ Watch Out For

    > Tinea capitis and pediculosis capitis are both highly contagious — the cosmetologist must always refuse service and refer the client out. This is a heavily tested safety concept.


    > Dandruff (pityriasis) is a condition the cosmetologist can work with, but they cannot treat fungal or parasitic conditions. Know the line between what's in your scope and what isn't.


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    Facial Treatments & Procedures


    Basic Facial Treatment Sequence


    > Remember the order — it is frequently tested!


    1. Cleansing – Remove makeup and surface debris

    2. Skin Analysis – Assess skin type and conditions under magnification lamp

    3. Exfoliation – Remove dead skin cells; improve cell turnover

    4. Extractions – Remove comedones (only when appropriate)

    5. Massage – Stimulate circulation; relax facial muscles

    6. Mask Application – Address specific skin concerns

    7. Toning – Restore pH; remove residue

    8. Moisturizer/Sunscreen – Hydrate and protect


    Facial Masks by Skin Type


    | Mask Type | Best For |

    |---|---|

    | Clay/Mud mask | Oily, acne-prone skin; draws out impurities and absorbs excess sebum |

    | Cream/Hydrating mask | Dry or mature skin; adds moisture |

    | Gel mask | Sensitive or irritated skin; calming and cooling |

    | Paraffin mask | Dry skin; seals in moisture with heat |


    Massage Movements


    | Movement | Description | When Used |

    |---|---|---|

    | Effleurage | Light, gliding strokes | Begin/end massage; use over bony areas and sensitive regions |

    | Petrissage | Kneading and lifting movements | Fleshy areas; stimulates deeper tissue |

    | Tapotement | Light tapping or percussion | Stimulating; use sparingly |

    | Friction | Deep circular rubbing | Stimulates circulation; use carefully |

    | Vibration | Fine trembling movements | Soothes nerve endings |


    Extractions – Contraindications


    Extractions are contraindicated (do NOT perform) when:

  • • Skin has pustules or cystic acne (active infection; spreading bacteria)
  • • Skin is inflamed or irritated
  • • Client has rosacea or highly sensitive skin
  • • Milia — use extreme caution; some may require physician referral

    • Toners and Astringents


  • • Toner – Mild; removes cleanser residue; restores skin's natural pH; suitable for normal to dry skin
  • • Astringent – Stronger; contains higher alcohol content; temporarily tightens pores; best for oily skin

    • Key Terms

  • • Effleurage – Light gliding massage stroke; used on bony/sensitive areas
  • • Extractions – Manual removal of comedones
  • • Contraindication – A condition that prevents a service from being safely performed
  • • Astringent – Strong toner; tightens pores; for oily skin
  • • Clay Mask – Absorbs oil; best for oily/acne-prone skin

    • ⚠️ Watch Out For

    > Effleurage is always used to begin and end a massage and must be used over bony areas. Exam questions often ask which technique is appropriate for specific facial zones.


    > The facial sequence order is heavily tested. A common mistake is placing toning before the mask — remember: mask comes before toner, moisturizer comes last.


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    Products & Ingredients


    Skincare Product Functions


    | Ingredient Type | Function | Example |

    |---|---|---|

    | Emollient | Softens/smooths skin; reduces moisture loss; fills in spaces between skin cells | Shea butter, petrolatum |

    | Humectant | Attracts and binds water to the skin; maintains hydration | Glycerin, hyaluronic acid |

    | Occlusive | Creates a barrier to prevent moisture loss | Mineral oil, waxes |

    | Exfoliant (Chemical) | Dissolves bonds between dead skin cells; promotes cell turnover | AHAs (glycolic acid), BHAs |

    | Sunscreen (SPF) | Protects skin from UVB radiation damage | Zinc oxide, SPF 30+ |


    Exfoliants


  • • Alpha Hydroxy Acids (AHAs) – Chemical exfoliants (glycolic acid, lactic acid); water-soluble; work on the skin's surface; best for dry, dull, or aging skin
  • • Beta Hydroxy Acids (BHAs) – (Salicylic acid); oil-soluble; penetrate deeper into pores; best for oily or acne-prone skin
  • • Physical/Mechanical exfoliants – Scrubs, microdermabrasion; manually remove dead cells via friction

    • SPF & Sun Protection


  • • SPF (Sun Protection Factor) – Measures protection against UVB rays (burning rays)
  • • SPF 30 means it takes 30 times longer for UVB rays to burn protected skin vs. unprotected skin
  • • UVA rays – Cause aging and deeper skin damage (penetrate glass)
  • • UVB rays – Cause sunburns; primary target of SPF ratings
  • • Broad-spectrum sunscreen protects against both UVA and UVB

    • Key Terms

  • • Emollient – Softens skin; reduces moisture loss
  • • Humectant – Attracts water to the skin (e.g., glycerin)
  • • AHAs – Chemical exfoliants; water-soluble; surface-level
  • • SPF – Sun Protection Factor; measures UVB protection
  • • Broad-spectrum – Protects against both UVA and UVB rays

    • ⚠️ Watch Out For

    > Humectants attract water; emollients soften skin. These are commonly confused. Glycerin = humectant. Shea butter = emollient.


    > AHAs are water-soluble; BHAs are oil-soluble. This distinction determines which skin type each is appropriate for and is a common exam question.


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    Sanitation & Safety in Skin/Scalp Services


    Disinfection of Tools & Implements


  • • Multi-use metal tools (e.g., comedone extractors, tweezers):

    • 1. Remove all debris by cleaning thoroughly

    2. Disinfect using an EPA-registered disinfectant solution

    3. Store in a clean, covered container

  • • Single-use items (cotton rounds, applicator sticks, lancets) – Must be discarded after one use
  • • Non-porous surfaces – Must be cleaned and disinfected between clients

    • Scope of Practice – Key Rules


    | Condition | Cosmetologist's Action |

    |---|---|

    | Tinea Capitis (ringworm) | Refuse service; refer to physician |

    | Pediculosis Capitis (head lice) | Refuse service; refer to healthcare provider |

    | Pustular/Cystic Acne | Do not perform extractions |

    | Rosacea | Avoid heat, friction, stimulation |

    | Psoriasis (severe) | Refer to physician |

    | Seborrheic Dermatitis (mild) | May perform service with care |


    Key Terms

  • • EPA-registered disinfectant – Required for multi-use tools
  • • Contraindication – Reason to avoid a service
  • • Scope of practice – The legal boundaries of what a cosmetologist may perform
  • • Single-use items – Disposable; cannot be reused

    • ⚠️ Watch Out For

    > Cleaning is NOT the same as disinfecting. You must clean first (remove debris), then disinfect (kill pathogens). Skipping the cleaning step means the disinfectant may not work effectively.


    > If you see a contagious condition on the exam, the answer is almost always: refuse service and refer to a physician. When in doubt, refer out.


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    Quick Review Checklist


    Use this checklist to confirm you have mastered the key concepts before your exam:


  • • [ ] I can identify the layers of the skin and describe the function of each
  • • [ ] I know the location and function of the stratum germinativum
  • • [ ] I can explain the acid mantle and its normal pH range (4.5–5.5)
  • • [ ] I know the role of melanin in the skin
  • • [ ] I can distinguish between the four basic skin types and their characteristics
  • • [ ] I can differentiate between a comedone and milia
  • • [ ] I can identify rosacea and know appropriate service modifications
  • • [ ] I can identify tinea capitis and pediculosis capitis and know to refuse service
  • • [ ] I can differentiate between pityriasis capitis simplex (dry dandruff) and pityriasis steatoides (oily dandruff)
  • • [ ] I know the **correct order of a basic
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