Aromatherapy is the use of aromatic plant oils, including essential oils, for psychological and physical wellbeing. Aromatherapists blend therapeutic essential oils especially for each individual and suggest methods of use such as topical application, massage, inhalation or water immersion to stimulate the desired responses.

The different smells (aromas), and the chemical constituents of the oils, can produce different emotional and physiological reactions. Essential oils can be massaged into the skin, added to bath water or vaporised in an oil burner. Although aromatherapy has been practised for centuries in various cultures, the modern version was developed mainly in France. Aromatherapy has not yet undergone as much scientific scrutiny as other complementary therapies, but research so far shows that it can be an effective treatment for some complaints.

A range of symptoms

Aromatherapy can be of benefit as a form of preventative health care. Aromatic plant oils can stimulate, balance, uplift, soothe and calm. Aromatherapists believe the release of stress and tension can allow the body’s own healing process to begin.

Aromatherapy is used to alleviate the symptoms of:

• Digestive problems

• Eczema
• Headaches
• Insomnia
• Stress.

Using essential oils

Essential oils are extracted from plant material using steam or water distillation. Selected plant materials are heated with steam, water or both until the essential oil vaporises. The oil then condenses as it cools.

All volatile aromatic plant oils are concentrated plant oils. They should be used sparingly: only a few drops at a time and always diluted in some other medium, such as plain massage oil (cold pressed vegetable oil) or unscented base cream (but not a mineral oil cream such as most brands of sorbolene or baby oil). Aromatic plant oils do not dissolve in water unless mixed with a dispersant first.

Some of the ways in which aromatic plant oils can be used include:

• Massage – 4–6 drops added to 20ml (a tablespoon) of vegetable-based oil.

• Oil burner – 6 drops added to water and vaporised in a burner. Never leave a candle oil burner unattended, as it is a fire risk. Electric vaporisers are available and are safer to use when asleep or near children.
• Bath – 4–6 drops added to a vegetable-based oil in a full bath.

• Inhalation – 2–3 drops added to a basin of hot water.

Aromatic plant oils, including essential oils, should never be ingested (taken in by mouth) as they can be toxic.

The sense of smell

The nostrils open up inside the skull to form the nasal cavity, which sits directly beneath the brain. Embedded in the ceiling of the nasal cavity are the olfactory cells. Each cell has tiny, moist hairs that trap odour molecules. It is thought that an odour is translated into electrical impulses by these cells, then passed on to the brain via the two olfactory bulbs. The message is interpreted by a part of the brain called the cerebral cortex. The sense of smell is poorly understood, but we do know that it is linked to the oldest, most primitive part of our brain and seems to have a direct link to our emotions.

Change is triggered in the brain

According to aromatherapy theory, the aromatic plant oil molecules bring about changes in the brain. Some researchers believe that when people experience mood changes or physical changes, it is because the smell has triggered a memory. For instance, if a person feels relaxed when they smell cinnamon, it might be because cinnamon conjures up pleasant childhood memories.

Popular aromatic plant oils

A few of the popular aromatic plant oils and their uses for the following symptoms include:

• Peppermint – digestive disorders.

• Rosemary – muscular pains, mental stimulant. • Sandalwood – depression, anxiety and nervous tension. • Sweet orange – depression and anxiety. • Tea tree – respiratory problems, antifungal, antibacterial and antiviral. • Lavender – headaches, insomnia, burns, aches and pains.

Handle with care

Some aromatic plant oils are toxic and should never be used at all – for example, camphor, pennyroyal and wintergreen.

Aromatic plant oils are very potent and should never be swallowed or applied undiluted to the skin. People with asthma and those prone to nose bleeds should use caution when inhaling vaporising oils. Do not use aromatic plant oils in any orifice such as ears, mouth or vagina.

Aromatic plant oils (essential oils) can be poisonous if taken in by mouth. Consumption of essential oils is an increasing cause of poisoning in children. All aromatic plant oils should be secured and kept out of reach of children. If poisoning occurs, ring triple zero (000) or the Poisons Information Centre on 131 126.

Pregnant women and people with certain conditions, including epilepsy and high blood pressure, should consult a qualified aromatherapist before using any aromatic plant oils. Some oils can be dangerous during pregnancy and for people with certain conditions.

Some people may be sensitive to aromatic plant oils

• Eucalyptus

• Ginger (carbon dioxide extracted)
• Thyme
• Black pepper
• Cinnamon
• Clove
• Oregano
• Lemongrass
• Basil
• Some citrus oils.

Where to get help

• Qualified professional aromatherapy practitioner

• Doctors or naturopaths with aromatherapy training
• International Federation of Aromatherapists

Things to remember

• Aromatherapy is the use of aromatic plant oils to bring about physiological and emotional changes.

• Aromatic plant oils should never be swallowed or applied undiluted to the skin.

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