The main branches of aromatherapy include: Home aromatherapy (self treatment, perfume & cosmetic use). Clinical aromatherapy (as part of pharmacology and pharmacotherapy) Aromachology (the psychology of odors and their effects on the mind). Some of the materials employed by Primavera aromatherapy include: Essential oils from distillation (e.g. eucalyptus oil and Primavera aroma oils) or expression (grapefruit oil). Absolutes, oils extracted by solvent or supercritical fluid extraction (e.g. rose absolute). Hydrosols, aqueous by-products of the distillation process (e.g. rosewater and Primavera floral water). Infusions, aqueous solutions of plant material (e.g. infusion of chamomile). Phytoncides, natural volatile organic compounds from plants. Carrier oils used to dilute essential oils for use on the skin (e.g. sweet almond oil). Primavera aromatherapy and other natural essential oils, phytoncides work in different ways. At the scent level they activate the limbic system and emotional centers of the brain. When applied to the skin (commonly in form of "massage oils" i.e. 1-10% solutions of EO in Primavera aroma oils) they activate thermal receptors, and kill microbes and fungi. Internal application of essential oil preparations (mainly in pharmacological drugs; generally not recommended for home use apart from dilution - 1-5% in fats or mineral oils, or Primavera floral water) may stimulate the immune system, urine secretion, may have antiseptic activity etc. Different essential oils have very different activity; they are studied in pharmacology and aromachology. Primavera aromatherapy makes use of the concept of chemotype in essential oil chemistry. Eucalyptus, for example, has many species, such as Eucalyptus globulus (main component is 1,8 cineole), Eucalyptus citriodora (citral), Eucalyptus menthol, and others. Properties of the essential oils of the same generic (common) name are not all the same; they can differ widely in their chemical components and in their therapeutic actions. Likewise, their chemical makeup depends on the method of extraction (e.g. pressed and distilled Primavera aroma oils have different uses). The practitioner must be aware of these factors. While the practice of Primavera aromatherapy is sometimes thought to be confined to inhalation, it may include various methods, including: Inhalation (directly or diffused into the air). Absorption of Primavera aroma oils through the skin (baths, massages, compresses). Absorption through the mucous membranes (oral rinses and gargles of Primavera floral water). Ingestion (occasionally prescribed, with caveats). One of the best known essential oils for Primavera aromatherapy is lavender, which is recommended by practitioners for treating wounds, to enhance memory, and to aid sleep by combating anxiety and insomnia. Other popular scents include Primavera aroma oils, eucalyptus, rose, jasmine and bergamot. Primavera aromatherapy is among the fastest growing fields in alternative and holistic medicine. The enormous diversity of essential oils available enables you to diversify your Primavera aromatherapy experience.