ILLINOIS ESTHETICIAN EXAM PRACTICE QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
Infection Control and Sterilization Procedures
Anatomy, Physiology, and Histology of the Skin
Skin Care Products, Chemistry, and Ingredients
Facial Treatments and Equipment
Hair Removal Techniques (Tweezing, Waxing, Threading)
Makeup Application and Color Theory
Safety, Sanitation, and Client Protection
Laws, Rules, and Regulations for Illinois Estheticians
Professional Ethics, Communication, and Business Practices
Disorders, Diseases, and Contraindications
Introduction
This comprehensive assessment is designed to prepare candidates for the Illinois Esthetician Licensing
Examination. It evaluates both foundational knowledge and applied clinical judgment required for safe, effective,
and legally compliant practice. Questions span infection control, skin sciences, treatment protocols, Illinois state
regulations, and ethical decision-making. Each item uses a multiple-choice format, including scenario-based
questions that simulate real-world spa and salon challenges. Emphasis is placed on recognizing contraindications,
following universal precautions, and adhering to the Illinois Department of Financial and Professional Regulation
(IDFPR) standards. Mastery of this content supports client safety, professional integrity, and exam readiness.
,SECTION ONE: QUESTIONS 1 – 100
1. A client presents with a raised, red, tender lesion filled with pus on the chin. Which term correctly identifies
this condition?
A. Milium
B. Comedone
C. Pustule
D. Cyst
🟢C
🔴 RATIONALE: A pustule is a raised, inflamed lesion containing pus, typically seen in acne vulgaris. Milia are
keratin-filled cysts, comedones are clogged follicles, and cysts are deeper, larger lesions.
2. Under Illinois administrative rules, which disinfectant level is required for non-critical implements that contact
intact skin?
A. Low-level
B. Intermediate-level
C. High-level
D. Sterilant-level
🟢B
🔴 RATIONALE: Illinois rules require intermediate-level disinfection for non-critical items (e.g., spatulas, bowls)
that contact intact skin, using EPA-registered hospital-grade tuberculocidal disinfectants.
3. A client’s chief complaint is “my skin feels tight and looks flaky.” Which skin type is most likely?
A. Oily
B. Combination
,C. Dry
D. Normal
🟢C
🔴 RATIONALE: Dry skin lacks adequate sebum and moisture, resulting in tightness, flaking, and a rough
texture. Oily skin appears shiny, combination shows mixed zones, and normal skin is balanced.
4. Which method of hair removal involves using a twisted cotton thread to roll over and trap hairs?
A. Shaving
B. Epilation via tweezers
C. Threading
D. Sugaring
🟢C
🔴 RATIONALE: Threading uses a twisted cotton thread to grasp and remove multiple hairs at the follicle level,
common for eyebrows and upper lip. Shaving cuts at surface; sugaring uses a paste.
5. When performing a high-frequency treatment, which gas is commonly used in a glass electrode to produce
an antibacterial effect?
A. Oxygen
B. Argon
C. Neon
D. Nitrogen
🟢C
🔴 RATIONALE: Neon gas produces an orange-red glow and has mild antibacterial and drying effects. Argon
, produces violet-blue light but is less common for acne; oxygen and nitrogen are not used in standard
electrodes.
6. A new client reports a history of herpes simplex lesions on the lip. What is the correct action before
performing a lip wax?
A. Proceed if no active lesion is visible
B. Apply topical antiviral cream then wax
C. Refuse service and refer to a physician
D. Use hard wax only for safety
🟢C
🔴 RATIONALE: Herpes simplex is contagious and can be spread by waxing even without visible lesions due to
viral shedding. Illinois standards advise postponing waxing and referring to a physician.
7. Which layer of the epidermis contains actively dividing keratinocytes and is the thickest in glabrous skin?
A. Stratum corneum
B. Stratum lucidum
C. Stratum granulosum
D. Stratum spinosum
🟢D
🔴 RATIONALE: The stratum spinosum is the thickest layer of living epidermis, containing keratinocytes held
together by desmosomes. Stratum corneum is dead; lucidum is clear layer; granulosum is granular.
8. A client wants to lighten their overall complexion using a salon treatment. What is the most ethical response?
A. Offer a chemical peel with hydroquinone
B. Explain that skin lightening is not legally permitted in Illinois for cosmetic purposes
RATIONALES 2026 Q&A | INSTANT DOWNLOAD PDF
Core Domains
Infection Control and Sterilization Procedures
Anatomy, Physiology, and Histology of the Skin
Skin Care Products, Chemistry, and Ingredients
Facial Treatments and Equipment
Hair Removal Techniques (Tweezing, Waxing, Threading)
Makeup Application and Color Theory
Safety, Sanitation, and Client Protection
Laws, Rules, and Regulations for Illinois Estheticians
Professional Ethics, Communication, and Business Practices
Disorders, Diseases, and Contraindications
Introduction
This comprehensive assessment is designed to prepare candidates for the Illinois Esthetician Licensing
Examination. It evaluates both foundational knowledge and applied clinical judgment required for safe, effective,
and legally compliant practice. Questions span infection control, skin sciences, treatment protocols, Illinois state
regulations, and ethical decision-making. Each item uses a multiple-choice format, including scenario-based
questions that simulate real-world spa and salon challenges. Emphasis is placed on recognizing contraindications,
following universal precautions, and adhering to the Illinois Department of Financial and Professional Regulation
(IDFPR) standards. Mastery of this content supports client safety, professional integrity, and exam readiness.
,SECTION ONE: QUESTIONS 1 – 100
1. A client presents with a raised, red, tender lesion filled with pus on the chin. Which term correctly identifies
this condition?
A. Milium
B. Comedone
C. Pustule
D. Cyst
🟢C
🔴 RATIONALE: A pustule is a raised, inflamed lesion containing pus, typically seen in acne vulgaris. Milia are
keratin-filled cysts, comedones are clogged follicles, and cysts are deeper, larger lesions.
2. Under Illinois administrative rules, which disinfectant level is required for non-critical implements that contact
intact skin?
A. Low-level
B. Intermediate-level
C. High-level
D. Sterilant-level
🟢B
🔴 RATIONALE: Illinois rules require intermediate-level disinfection for non-critical items (e.g., spatulas, bowls)
that contact intact skin, using EPA-registered hospital-grade tuberculocidal disinfectants.
3. A client’s chief complaint is “my skin feels tight and looks flaky.” Which skin type is most likely?
A. Oily
B. Combination
,C. Dry
D. Normal
🟢C
🔴 RATIONALE: Dry skin lacks adequate sebum and moisture, resulting in tightness, flaking, and a rough
texture. Oily skin appears shiny, combination shows mixed zones, and normal skin is balanced.
4. Which method of hair removal involves using a twisted cotton thread to roll over and trap hairs?
A. Shaving
B. Epilation via tweezers
C. Threading
D. Sugaring
🟢C
🔴 RATIONALE: Threading uses a twisted cotton thread to grasp and remove multiple hairs at the follicle level,
common for eyebrows and upper lip. Shaving cuts at surface; sugaring uses a paste.
5. When performing a high-frequency treatment, which gas is commonly used in a glass electrode to produce
an antibacterial effect?
A. Oxygen
B. Argon
C. Neon
D. Nitrogen
🟢C
🔴 RATIONALE: Neon gas produces an orange-red glow and has mild antibacterial and drying effects. Argon
, produces violet-blue light but is less common for acne; oxygen and nitrogen are not used in standard
electrodes.
6. A new client reports a history of herpes simplex lesions on the lip. What is the correct action before
performing a lip wax?
A. Proceed if no active lesion is visible
B. Apply topical antiviral cream then wax
C. Refuse service and refer to a physician
D. Use hard wax only for safety
🟢C
🔴 RATIONALE: Herpes simplex is contagious and can be spread by waxing even without visible lesions due to
viral shedding. Illinois standards advise postponing waxing and referring to a physician.
7. Which layer of the epidermis contains actively dividing keratinocytes and is the thickest in glabrous skin?
A. Stratum corneum
B. Stratum lucidum
C. Stratum granulosum
D. Stratum spinosum
🟢D
🔴 RATIONALE: The stratum spinosum is the thickest layer of living epidermis, containing keratinocytes held
together by desmosomes. Stratum corneum is dead; lucidum is clear layer; granulosum is granular.
8. A client wants to lighten their overall complexion using a salon treatment. What is the most ethical response?
A. Offer a chemical peel with hydroquinone
B. Explain that skin lightening is not legally permitted in Illinois for cosmetic purposes
