Esthetician Comprehensive Study Guide

Safety and Infection Control

  • Regulatory Agencies and Standards     - Environmental Protection Agency (EPA): Registers all types of disinfectants sold and used in the United States.     - Occupational Safety and Health Administration (OSHA): Created by the Department of Labor to regulate and enforce safety and health standards to protect employees. It mandates the Hazard Communication Standard (HCS), which requires chemical manufacturers and importers to assess and communicate potential hazards associated with products.     - Safety Data Sheet (SDS): Formerly known as Material Safety Data Sheet (MSDS). Federal and state law requires manufacturers to supply an SDS for all products sold. It contains information including hazardous ingredients, safe handling, use procedures, and precautions to reduce risks of accident/overexposure and flammability warnings.

  • Concepts in Disinfection     - Disinfectants: Chemical products that destroy all bacteria, fungi, and viruses on surfaces.     - Hospital Disinfectant: Effective for cleaning blood and body fluids. Used on non-porous surfaces.     - Non-porous: Items made of material with no pores or openings that cannot absorb liquids.     - Tuberculocidal Disinfectant: Kills the bacteria that cause tuberculosis.

  • Infectious Diseases and Pathogens     - Infection Control: Methods used to eliminate or reduce the transmission of infectious organisms.     - Bacteria: One-celled microorganisms with both plant and animal characteristics.     - Non-pathogenic: Harmless organisms.     - Pathogenic: Harmful microorganisms that cause disease or infection.     - Types of Pathogenic Bacteria:         - Cocci: Round-shaped bacteria appearing singly or in groups.         - Diplococci: Grow in pairs; cause pneumonia.         - Staphylococci: Pus-forming, grow in clusters like grapes; cause abscesses, pustules, and boils. Carried by one-third of the population.         - Streptococci: Pus-forming, arranged in curved lines like string beans; cause strep throat and blood poisoning.         - Bacilli: Short, rod-shaped. Most common bacteria. Cause diphtheria, tetanus (jawlock), typhoid fever, and tuberculosis.         - Spirilla: Spiral or corkscrew-shaped. Includes Treponema pallidum (syphilis) and Borrelia burgdorferi (Lyme disease).     - Growth and Reproduction:         - Active Phase: Bacteria grow and reproduce. They split into two cells via mitosis; the resulting cells are called Daughter Cells.         - Inactive Phase: Certain bacteria coat themselves with a wax-like outer shell to survive unfavorable conditions.     - Viruses: Capable of replication only by taking over a host cell\'s reproductive function. Unaffected by antibiotics; vaccines prevent growth.     - Fungi: Microscopic plant parasites (molds, mildew, yeast). Live off keratin.         - Tinea Pedis: Athlete\'s foot.         - Onychomycosis: Nail infection.         - Folliculitis: Inflammation of hair follicles caused by bacterial infection from ingrown hairs.         - Tinea Versicolor: Sun spots.     - Parasites: Organisms that grow, feed, and shelter on or in another organism (e.g., lice, scabies).     - Bloodborne Pathogens: Disease-causing microorganisms carried by blood or body fluids (e.g., Hepatitis, HIV/AIDS).

  • Levels of Decontamination     - 1. Sanitation: Significantly reduces the number of pathogens on a surface (e.g., using soap).     - 2. Disinfection: Kills most microorganisms on non-porous surfaces/tools. Does NOT kill bacterial spores. Requires EPA-registered disinfectant or alcohol no less than 70%70\%. Quaternary Ammonium Compounds (QUATS) typically disinfect in 1010-15 minutes15\,\text{minutes}.     - 3. Sterilization: Highest level. Completely destroys all microbial life, including spores. Uses high-pressure steam equipment called Autoclaves.

  • Safe Working Practices     - Hand Hygiene: Wash hands with antibacterial soap for at least 20 seconds20\,\text{seconds} before and after each client interaction.     - Exposure Incident Procedure:         1. Stop service immediately.         2. Put on gloves to protect yourself.         3. Apply pressure to stop bleeding.         4. Clean injured area with antiseptic wipe.         5. Bandage the cut.         6. Clean/disinfect work area.         7. Discard single-use items in a double bag.         8. Clean tools in EPA-graded solution.     - Burns:         - 1st1^{\text{st}} Degree: Minor, affects epidermis; redness/irritation, no blisters.         - 2nd2^{\text{nd}} Degree: Affects epidermis and dermis; redness and blisters.         - 3rd3^{\text{rd}} Degree: Affects all skin layers; blisters, swelling, scarring, and possible nerve damage.         - 4th4^{\text{th}} Degree: Affects skin, muscle, nerves, ligaments, tendons, and bone; always requires medical attention.     - Eye Flush: Gently flush for 15 minutes15\,\text{minutes} and seek medical attention.

Client Consultation and Professionalism

  • Essential Forms     - Client Intake Form: Also called a questionnaire or consultation card. Protects the salon from legal action. Should be filled out by every new client.     - Client Release Form: Written agreement where the client accepts the risks involved in a treatment.

  • Contraindications: Conditions or factors that may prevent a treatment from being performed.

  • Professional Conduct: Maintain boundaries, avoid medical advice, practice active listening, and be clear.

Skin Structure and Analysis

  • Characteristics of Healthy Skin: Slightly moist, soft, smooth, and somewhat acidic.

  • Six Primary Functions of the Skin:     1. Protection: The Acid Mantle (sebum, lipids, sweat, and water) forms a Hydrolipidic Film. Protects against Transepidermal Water Loss (TEWL).     2. Sensation: Sensory nerve endings respond to touch, pain, cold, heat, and pressure.     3. Heat Regulation: Average body temperature is 98.6∘F98.6^{\circ}\text{F}. Arrector Pili Muscles cause goosebumps when cold.     4. Excretion: Sudoriferous Glands (sweat glands) detoxify the body through pores.     5. Secretion: Sebaceous Glands (oil glands) produce Sebum to lubricate skin and hair.     6. Absorption: Necessary for skin health (oxygen, water).

  • Layers of the Epidermis (Outermost Layer)     1. Stratum Corneum (Horny Layer): Outermost, thin, waterproof, and permeable. Keratinocytes harden into Corneocytes.     2. Stratum Lucidum (Clear Layer): Translucent dead cells; thickest on palms and soles.     3. Stratum Granulosum (Granular Layer): Keratin production occurs here; enzymes dissolve structures holding cells together.     4. Stratum Spinosum (Spiny Layer): Cells divide and change shape. Contains Desmosomes (protein bonds) and Langerhans Immune Cells.     5. Stratum Germinativum (Basal Cell Layer): Mother cells divide via mitosis to form daughter cells.

  • Layers of the Dermis (True Skin)     - Papillary Layer: Connects dermis to epidermis via the dermal/epidermal junction (1010-20%20\% of dermis).     - Reticular Layer: Denser, deeper layer mainly composed of Collagen (70%70\% of dermis) and Elastin.     - Subcutaneous Tissue (Hypodermis): Composed of Adipose Tissue (80%80\% fat); provides energy and cushioning.

  • Skin Analysis and Classification     - Fitzpatrick Scale: Classification of skin types and their reaction to UV rays (II through VIVI).     - Glogau Scale: Evaluates wrinkles based on photoaging.     - Rubin Scale: Categories for photodamage (33 stages).     - Skin Types:         - Dry: Lacks oil (alipidic); small follicles.         - Oily: Excess sebum; large follicles; prone to blemishes.         - Normal: Good oil/water balance.         - Combination: Oily in T-zone, dry/normal on outer face.         - Sensitive: Fragile, thin skin, easily irritated.         - Alipidic: Not enough oil.         - Lipidic: Produces excess sebum.         - Anemic: Itchy with tiny red dots under the skin.

Disorders and Lesions

  • Primary Lesions:     - Bulla: Large blister.     - Cyst: Closed sac containing pus.     - Macule: Flat spot (freckle).     - Pustule: Inflamed papule with white/yellow center containing pus.     - Wheal: Itchy, swollen lesion (hives).

  • Secondary Lesions:     - Fissure: Crack in the skin.     - Keloid: Thick scar from excessive fiber growth.     - Ulcer: Open lesion with loss of skin depth.

  • Gland Disorders:     - Asteatosis: Dry, scaly skin from sebum deficiency.     - Steatoma: Sebaceous cyst or tumor (wen).     - Bromhidrosis: Foul-smelling perspiration.     - Hyperhidrosis: Excessive perspiration.     - Miliaria Rubra: Prickly heat.

  • Pigmentation Disorders:     - Chloasma: Liver spots.     - Lentigo: Flat freckle-like area.     - Nevus: Birthmark or mole.     - Vitiligo: White irregular patches.

  • Skin Cancer:     - Basal Cell Carcinoma: Shiny bumps with light curly nodules; most common.     - Squamous Cell Carcinoma: Red/pink scaly papules that do not heal.     - Malignant Melanoma: Dark patches, uneven texture, jagged edges. 90%90\% of cancers caused by sun exposure.

Products and Chemistry

  • Ingredient Types:     - Functional Ingredients: Provide the product\'s form (e.g., Water, Emollients, Surfactants).     - Performance Ingredients: Cause actual changes in appearance.     - Emollients: Lubricate and moisturize (e.g., Jojoba oil, Mineral oil).     - Surfactants: Reduce surface tension.     - Anhydrous: Products containing no water; good for dry skin.

  • Exfoliants:     - Alpha Hydroxy Acids (AHA): Glycolic, Lactic, Malic, Citric, Tartaric. Work on the surface. Estheticians use up to 30%30\%.     - Beta Hydroxy Acids (BHA): Salicylic acid. Oil-soluble, works deep in pores. Recommended concentration no more than 10%10\% with pH > 3.53.5.

Procedures and Massage

  • Facial Steps:     1. Consultation/Allergy check.     2. Setup and Sanitization.     3. Pre-cleanse and Cleanse.     4. Skin Analysis (use eye pads).     5. Exfoliation (remove with hot towel).     6. Massage.     7. SPF application.

  • Massage Manipulations:     - Effleurage: Soft, continuous stroking; used at beginning and end.     - Petrissage: Kneading movement; stimulates underlying tissue.     - Friction: Rubbing movement; stimulates glandular activity.     - Tapotement: Percussion/tapping; most stimulating.     - Vibration: Rapid shaking; highly stimulating.     - Direction: Always massage from Insertion to Origin.

Electrotherapy and Machines

  • Steamer: Keep 1515-18 inches18\,\text{inches} away for 66-10 minutes10\,\text{minutes}.

  • High Frequency: Uses Tesla Current (violet). Has antiseptic and healing effects. Mushroom electrode used for "sparking" lesions.

  • Galvanic Current: Performs Desincrustation (softening debris) and Iontophoresis (infusing products).     - Cataphoresis: Infusion of positive (+) products.     - Anaphoresis: Infusion of negative (-) products.

  • Wood\'s Lamp: Filtered black light used to see fungi and pigmentation.

  • Microdermabrasion: Mechanical exfoliation removing the top layer of skin with a diamond head or crystals.

  • Microcurrent: Low-level electricity that tones and firms muscles.

Hair Removal and Makeup

  • Hair Growth Cycles:     1. Anagen: Active growth phase.     2. Catagen: Transition/slow down phase.     3. Telogen: Resting phase; hair falls out.

  • Definitions:     - Lanugo: Fetal hair.     - Terminal: Coarse hair (brows, legs).     - Trichology: The study of hair.

  • Methods:     - Depilation: Removing hair at the skin level (shaving, depilatories).     - Epilation: Removing hair from the follicle (waxing, tweezing, threading).     - Electrolysis: Permanent hair removal using electricity (Galvanic, Thermolysis, or Blend).

  • Makeup Theory:     - Primary Colors: Red, Yellow, Blue.     - Warm Tones: Red, Yellow, Orange.     - Cool Tones: Blue, Blue-red, Violet.

Electricity and Physics

  • Volt: Force/pressure of current.

  • Amp/Ampere: Measures strength of current.

  • Milliampere: Unit used in skin treatments (11000\frac{1}{1000} of an Amp).

  • Ohm: Measures electrical resistance.

  • Watt: Measures how much electricity is being used.

  • Direct Current (DC): Flow in one direction (batteries).

  • Alternating Current (AC): Flow in two directions (wall plugs).