Skin Disorders, Diseases & Lesions Evaluation

Arizona Esthetician License Study Guide Exam

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1 Chapter 1: Arizona State Board Laws, Rules & Licensing

Arizona Barbering & Cosmetology Board Authority & Licensing Requirements Salon & Spa Operating Regulations in Arizona Client Consultation, Health History & Informed Consent Professional Ethics, Scope of Practice & Business Standards

2 Chapter 2: Infection Control, Microbiology & Safety

Microbiology & Pathogens in the Spa Environment Levels of Decontamination & Infection Control Protocols Bloodborne Pathogens, Exposure Incidents & First Aid Protocols Treatment Room Safety, Ergonomic Practices & Chemical Handling

3 Chapter 3: Skin Anatomy, Physiology & Histology

Integumentary System Structure & Primary Skin Functions Skin Histology, Cell Turnover & Glandular Systems Skin Typing, Analysis & Fitzpatrick Scale Classification Skin Disorders, Diseases & Lesions Evaluation

4 Chapter 4: Facial Treatments, Exfoliation & Advanced Modalities

Standard & Deep Cleansing Facial Protocols & Massage Manipulations Chemical Exfoliation & Hydroxy Acid Treatments Mechanical Exfoliation & Microdermabrasion Procedures Electrical Modalities & Light Therapy in Esthetics

5 Chapter 5: Hair Removal, Makeup & Lash/Brow Services

Hair Anatomy, Growth Cycles & Removal Fundamentals Waxing, Sugaring & Tweezing Application Protocols Makeup Application, Color Theory & Facial Morphology Lash & Brow Enhancements, Tinting & Safety

Skin Disorders, Diseases & Lesions Evaluation

Key Takeaways Explain This Topic AI

Primary lesions represent initial structural changes (macules, papules, plaques, nodules, vesicles, bullae, pustules, wheals, cysts), whereas secondary lesions result from lesion progression, trauma, or healing (crusts, scales, excoriations, fissures, ulcers, scars, keloids).

Acne vulgaris is categorized into Grades I through IV based on severity, with Grade IV (cystic acne) requiring immediate referral to a dermatologist.

Rosacea is a chronic inflammatory vascular disease causing facial erythema, telangiectasia, and papulopustular breakouts triggered by heat, alcohol, spicy foods, and UV light.

Melasma is a bilateral hormonal hyperpigmentation triggered by estrogen/progesterone fluctuations and sun exposure, commonly referred to as the 'mask of pregnancy.'

The ABCDE criteria (Asymmetry, Border, Color, Diameter, Evolving) serve as the essential clinical standard for recognizing potential malignant melanoma.

Last updated: July 2026

Skin Disorders, Diseases & Lesions Evaluation

Recognizing dermatological disorders, identifying cutaneous lesions, and understanding skin cancer warning signs are vital responsibilities for licensed estheticians. Estheticians do not diagnose medical conditions; instead, they analyze lesions to determine treatment suitability and refer clients to board-certified dermatologists when suspicious lesions arise.

Primary vs. Secondary Skin Lesions

Dermatological lesions are structural abnormalities of cutaneous tissue classified into primary lesions (initial structural changes present at disease onset) and secondary lesions (changes resulting from lesion progression, mechanical trauma, or healing).

Lesion Type Clinical Classification Size & Physical Characteristics Example Cutaneous Condition

Macule Primary (Flat) Flat, circumscribed color change < 1 cm; non-palpable Freckle (ephelis), flat nevus, petechiae

Papule Primary (Raised, Solid) Solid, elevated lesion < 1 cm containing no fluid Acne papule, lichen planus, elevated nevus

Plaque Primary (Raised, Solid) Broad, flat-topped elevated lesion > 1 cm formed by coalescing papules Psoriasis plaque

Nodule Primary (Raised, Solid) Solid, firm lesion > 1 cm extending deeper into the dermis Dermatofibroma, deep inflammatory acne nodule

Vesicle Primary (Fluid-Filled) Elevated, fluid-filled blister < 1 cm containing clear serous fluid Herpes simplex, chickenpox (varicella), contact dermatitis

Bulla Primary (Fluid-Filled) Large blister > 1 cm containing serous fluid Second-degree burn, pemphigus vulgaris

Pustule Primary (Pus-Filled) Elevated, circumscribed lesion containing purulent exudate (pus) Inflammatory acne pustule, folliculitis

Wheal Primary (Transient) Transient, edematous, itchy elevated area caused by dermal fluid leakage Urticaria (hives), insect bite reaction

Cyst Primary (Encapsulated) Encapsulated sac in dermis or subcutis containing liquid or semisolid material Sebaceous cyst, epidermoid cyst

Crust Secondary Dried residue of serum, blood, or purulent exudate on skin surface Scab over a healing wound, impetigo crust

Scale Secondary Shedding, flaky dead epidermal cells accumulated on surface Psoriasis, dandruff (seborrheic dermatitis), eczema

Excoriation Secondary Superficial mechanical abrasion or scratch mark breaking the epidermis Scratched insect bite, neurotic excoriation

Fissure Secondary Linear crack or split extending through epidermis into the dermis Chapped lips, athlete's foot (tinea pedis)

Ulcer Secondary Deep loss of epidermal and dermal tissue leaving an open depression Stasis ulcer, pressure sore

Keloid Secondary Hypertrophic, overgrown scar tissue expanding beyond original wound borders Keloid scar following surgery or body piercing

Pathophysiology and Grading of Acne Vulgaris

Acne vulgaris is a chronic inflammatory disorder of the pilosebaceous unit. Its development is driven by a primary pathophysiological triad: FOLLICULAR HYPERKERATOSIS + SEBUM OVERPRODUCTION + CUTIBACTERIUM ACNES PROLIFERATION ---> INFLAMMATORY ACNE

Retention Hyperkeratosis : Hereditary tendency of follicular keratinocytes to adhere together, forming a keratin plug ( microcomedo ).

Androgen-Driven Sebum Overproduction : Hormones enlarge sebaceous glands, increasing lipid secretion.

Bacterial Proliferation : Anaerobic Cutibacterium acnes ( C. acnes ) bacteria thrive in blocked, sebum-rich follicles, producing lipase enzymes that break down sebum into irritating free fatty acids, triggering inflammatory cascades.

Acne Grading Scale (Grades I – IV) GRADE I (Mild) -----------> GRADE II (Moderate) -------> GRADE III (Severe) ---------> GRADE IV (Cystic)

• Comedones primary Comedones + Papules Numerous Papules/Pustules Deep Cysts & Nodules
• Few papules Numerous Pustules Inflamed Nodules Dermatologist Referral

Grade I (Mild) : Predominantly non-inflammatory open comedones (blackheads) and closed comedones (whiteheads) with occasional minor papules. Responds well to esthetic treatments.

Grade II (Moderate) : Numerous open and closed comedones accompanied by frequent inflammatory papules and pustules.

Grade III (Severe) : Prominent inflammatory papules, pustules, and deep, painful erythematous nodules. Requires cautious esthetic care.

Grade IV (Cystic / Nodulocystic) : Severe inflammatory acne featuring deep, painful cysts, coalescing nodules, and widespread pustules. High risk of permanent ice-pick or boxcar scarring. Estheticians must refrain from manual extraction and refer Grade IV acne directly to a dermatologist.

• Vascular and Pigmentary Disorders
• Rosacea

Rosacea is a chronic inflammatory vascular disease primarily affecting the central facial area (cheeks, nose, forehead, chin). It is characterized by persistent facial erythema , telangiectasias (dilated superficial capillaries), papules, pustules, and in advanced stages, rhinophyma (tissue hypertrophy of the nose).

Triggers : Sun exposure, extreme heat/cold, alcohol, spicy foods, caffeine, strenuous exercise, and emotional stress.

Melasma and Pigmentary Changes

Melasma (Chloasma) : Bilateral, symmetrical macular hyperpigmentation occurring on the face. Driven by hormonal changes (estrogen and progesterone elevation during pregnancy or oral contraceptive use) combined with UV exposure. Often referred to as the "mask of pregnancy."

Post-Inflammatory Hyperpigmentation (PIH) : Excess melanin production triggered by inflammatory cutaneous trauma such as acne, burns, or aggressive chemical peels.

Cutaneous Carcinomas & The ABCDE Melanoma Framework

Skin cancer is the most common form of cancer. Estheticians must recognize the clinical presentations of malignant skin lesions.

Major Types of Skin Carcinomas

Basal Cell Carcinoma (BCC) : Most common skin cancer (75–80% of cases). Arises from stratum basale cells. Presents as a smooth, pearly or waxy bump with rolled borders and visible surface telangiectasia. Rarely metastasizes, but locally destructive.

Squamous Cell Carcinoma (SCC) : Arises from keratinocytes in the stratum spinosum. Appears as a firm, red nodule or scaly, crusted plaque that may bleed. Can metastasize if left untreated.

Malignant Melanoma : Most dangerous form of skin cancer. Arises from melanocytes. Highly invasive and rapidly metastasizes to lymph nodes and internal organs.

The ABCDE Evaluation Criteria for Melanoma

Estheticians use the ABCDE guide to evaluate suspicious pigmented lesions: [A] ASYMMETRY -------> One half of the lesion does not match the opposite half.

[B] BORDER ----------> Edges are irregular, notched, scalloped, or poorly defined.

[C] COLOR -----------> Color is uneven, displaying shades of brown, black, red, or blue.

[D] DIAMETER --------> Greater than 6 mm (0.25 inches), about the size of a pencil eraser.

[E] EVOLVING --------> Lesion changes over time in size, shape, color, or symptoms (bleeding).