8.3 Aromatherapy & Advanced Therapies: Essential Oils, Phytotherapy, Algotherapy, Ayurveda & Cryotherapy

Key Takeaways

  • Most essential oils are produced by steam distillation, while citrus oils are usually cold-pressed (expressed).

  • Essential oils are diluted in a carrier oil before skin use, and cold-pressed bergamot, lemon, and lime oils can cause phototoxic reactions with UV exposure.

  • Phytotherapy uses plants and plant extracts, and algotherapy uses algae and seaweed; seawater-based treatments are called thalassotherapy.

  • Ayurveda describes three doshas: vata (air and space), pitta (fire and water), and kapha (earth and water).

  • Cryotherapy uses cold to constrict vessels and calm inflammation; the FDA has not cleared whole-body cryotherapy chambers to treat any medical condition.

Last updated: October 2026

What the Outline Expects

The Advanced Practice outline lists two related items. In Scientific Concepts: "recognize and understand concepts in advanced therapies (e.g., cryogenic, ayurveda, phytotherapy, algotherapy)." In services: "apply knowledge of aromatherapy treatment," meaning the purpose and effect of products such as essential oils and botanicals, and their competent use. WAC 308-20-080(6)(g) also includes "advanced theories; alternative, touch, and spa body treatments" in the Washington master esthetics curriculum.

Aromatherapy Basics

Aromatherapy uses essential oils, which are concentrated, volatile aromatic compounds extracted from plants, to affect mood and the skin. Oils act through inhalation (the sense of smell connects to the brain's limbic system) and through topical application in massage, compresses, masks, and baths.

Extraction methodHow it worksTypical oils
Steam distillationSteam carries volatile oils from plant material, then condensesLavender, peppermint, eucalyptus, tea tree (the most common method)
Cold pressing (expression)Peels are pressed mechanicallyCitrus oils: bergamot, lemon, orange, lime
Solvent extractionSolvents pull oils from delicate flowers, producing "absolutes"Jasmine, some rose
CO2 extractionPressurized carbon dioxide acts as the solventMany modern specialty oils

Aromatherapists describe blends by notes: top notes evaporate fastest (citrus, peppermint), middle notes give the body of a blend (lavender, geranium), and base notes last longest (sandalwood, patchouli, vetiver).

Common Oils and Their Traditional Uses

OilTraditional esthetic useCaution
LavenderCalming, balancingPossible sensitizer for some clients
Tea treeAntimicrobial for oily or blemished skinCan irritate when undiluted
German chamomileSoothing; contains azuleneRagweed-family allergy
PeppermintCooling, stimulatingKeep away from the eyes and mucous membranes
EucalyptusOpens the airways; decongestingAvoid near infants' faces
RosemaryStimulating, invigoratingCaution with epilepsy and high blood pressure
GeraniumBalancing for combination skinPatch test
RoseHydrating and comforting for dry or mature skinPatch test

Safe Use

  • Dilute essential oils in a carrier oil (such as sweet almond, grapeseed, or jojoba) before applying them to skin. Low dilutions, about 1% to 2%, are common for facial use; follow the product's directions.
  • Patch test new oils, and ask about allergies, asthma, epilepsy, and pregnancy.
  • Phototoxicity: cold-pressed bergamot (from compounds such as bergapten), lemon, and lime can cause burns and dark patches when the skin is exposed to UV. Do not use them before sun exposure, and choose bergapten-free versions when available.
  • Pregnancy: many oils are avoided in pregnancy; get medical guidance.
  • Storage: keep oils in tightly closed dark glass bottles, away from heat and light, which degrade them.
  • Label and dispense correctly: WAC 308-20-110 requires containers to be labeled with their contents and products to be dispensed without contaminating the supply.

Phytotherapy

Phytotherapy is the use of plants and plant extracts for their therapeutic benefits. Common esthetic botanicals include aloe vera (soothing and hydrating), green tea (antioxidant), calendula (soothing), witch hazel (astringent), licorice root (brightening), and arnica (traditionally used for bruising). "Natural" does not mean non-allergenic, so screen for plant allergies.

Algotherapy and Thalassotherapy

  • Algotherapy uses algae and seaweed (kelp, bladderwrack, spirulina, and other marine algae) in masks, wraps, and baths for their minerals, vitamins, and moisture-binding sugars.
  • Thalassotherapy uses seawater, marine mud, and the seaside environment.
  • Seaweed can contain iodine, so screen for iodine or shellfish sensitivity and thyroid conditions (section 8.2).

Ayurveda

Ayurveda is a traditional system of medicine from India that seeks balance among three doshas (mind-body types):

DoshaElementsTypical skin description
VataAir and spaceDry, thin, cool; ages early
PittaFire and waterWarm, sensitive, prone to redness
KaphaEarth and waterThick, oily, smooth; congestion

Ayurvedic spa treatments include abhyanga (warm oil massage) and shirodhara (a steady stream of warm oil poured over the forehead). A spa may offer them for relaxation; an esthetician does not use ayurvedic concepts to diagnose disease.

Cryotherapy and Cryogenic Treatments

Cryotherapy uses cold to cause vasoconstriction, reduce swelling and inflammation, and temporarily tighten the look of the skin.

  • Cryo-facials and cold globes or wands: localized cold applied in continuous motion to calm redness and puffiness.
  • Whole-body cryotherapy: standing in a chamber of very cold air for a few minutes. The FDA has warned that it has not cleared or approved these chambers to treat any medical condition, and that they carry risks including frostbite, burns, and oxygen deprivation.
  • Medical cold procedures: cryolipolysis (FDA-cleared fat reduction devices) and cryosurgery with liquid nitrogen are medical procedures, not esthetic services.

Cold contraindications: cold urticaria (hives from cold), Raynaud's phenomenon, poor circulation, and reduced sensation. Never leave ice or very cold tools in one spot.

Choosing Holistic Services Responsibly

Holistic therapies can improve relaxation and comfort. Present them honestly: give their traditional purpose, avoid medical claims, and refer any medical concern to a physician.

Tip

Fast recall: steam distillation for most oils, cold pressing for citrus; bergamot means phototoxicity; vata, pitta, and kapha are the doshas; algae and seaweed are algotherapy.

Test Your Knowledge

Which essential oil is best known for causing phototoxic reactions when skin is exposed to UV after application?

A

Sandalwood

B

Steam-distilled lavender

C

Steam-distilled tea tree

D

Cold-pressed bergamot

Test Your Knowledge

In ayurveda, which dosha is associated with the elements of fire and water?

A

Kapha

B

Vata

C

Pitta

D

Prana

Test Your Knowledge

What does algotherapy use?

A

Electrical current through the follicle

B

Warm oil poured over the forehead

C

Algae and seaweed products

D

Cold air chambers

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