Dermal sensitization Essential Oils
Dermal sensitization is a type of allergic reaction. It occurs on first exposure to a substance, but on this occasion, the noticeable effect on the skin will be slight or absent. However, subsequent exposure to the same material, or to a similar one with which there is cross-sensitization, produces a severe inflammatory reaction brought about by cells of the immune system (T-lymphocytes). The reaction will be represented on the skin as blotchy or redness, which may be painful to some individuals. The problem with dermal sensitization is that once it occurs with a specific essential oil the individual is most likely going to be sensitive to it for many years and perhaps for the remainder of his/her life. The best way to prevent sensitization is to avoid known dermal sensitizers and avoid applying the same essential oils every day for lengthy periods of time. Sensitization is, to an extent, unpredictable, as some individuals will be sensitive to a potential allergen and some will not. According to Burfield (2004), the following oils listed are considered to be dermal sensitizers and are not recommended for use in aromatherapy massage.
| Essential Oil | Latin Name |
| Cassia | Cinnamomum cassia |
| Cinnamon bark | Cinnamomum zeylanicum |
| Peru balsam | Myroxylon pereirae |
| Verbena absolute | Lippia citriodora |
| Tea absolute | Camellia sinensis |
| Turpentine oil | Pinus spp. |
| Backhousia | Backhousia citriodora |
| Inula | Inula graveolens |
| Oxidized oils from Pinaceae family (e.g., Pinus and Cupressus species) and Rutaceae family (e.g., citrus oils) | |
References
- http://naha.org/explore-aromatherapy/safety/#dermal
- Bensouilah J, and Buck P. Aromadermatology. Abindon, UK: Radcliffe Publishing Ltd.
- Tisserand, R., and Balacs, T. (1995). Essential Oil Safety. New York: Churchill Livingstone.
