Complementary & Spa: Aromatherapy Safety and Spa Treatments
The Complementary & Spa domain tests aromatherapy blending and dilution, essential-oil safety, carrier-oil selection, massage within a spa context, and the heat and water treatments that form the spa menu. Questions typically ask which oil, which dilution, or which client you must decline or adapt for.
Carriers and dilution
- Carrier oils: sweet almond, grapeseed, jojoba, apricot kernel, sunflower. Grapeseed suits most skins; almond must be avoided with nut allergy; jojoba suits oily and sensitive skins.
- Dilution: 1 drop of essential oil is roughly 0.05 ml, so 1% = 1 drop per 5 ml of carrier (2 drops per 10 ml); 2% = 4 drops per 10 ml.
- Typical ranges: facial 0.5–1%, body massage 1–3%, and lower for children, older clients, pregnancy and sensitive skin.
Safety rules
- Never apply essential oils neat to skin and never advise ingestion.
- Phototoxic oils - expressed bergamot, lemon, lime and bitter orange - require sun avoidance for at least 12 hours after application.
- Avoid or limit in pregnancy: clary sage, rosemary, juniper, sage, jasmine. In epilepsy: rosemary, fennel, sage, hyssop. In hypertension: rosemary, thyme, sage.
- Patch test 24–48 hours before a first full aromatherapy treatment.
Heat and water treatments
- Sauna is dry heat, steam is moist heat; both raise core temperature and load the cardiovascular system.
- Contra-indications include pregnancy, uncontrolled hypertension, angina, recent surgery, diabetes with neuropathy and current alcohol use.
- Clients must be able to leave unaided, be offered water, and never be locked in.
Worked example
A client who is 20 weeks pregnant requests an aromatherapy back massage. Reasoning: massage is generally acceptable with consent, but the oil choice and heat must be adapted. Correct action: use grapeseed carrier at 1% dilution, avoid clary sage, rosemary, juniper and jasmine, position her semi-reclined or side-lying with pillows, skip the sauna, and record the pregnancy and any midwife advice.
Traps that cost marks
- Quoting a dilution without converting drops to millilitres.
- Forgetting phototoxicity warnings for expressed citrus oils.
- Sending a pregnant or cardiac client into the steam room.
- Skipping the patch test because the oil is 'natural'.