* [[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.
* [[Photosensitization Essential Oils]] : An essential oil that exhibits this quality will cause burning or skin pigmentation changes, such as tanning, on exposure to sun or similar light (ultraviolet rays). Reactions can range from a mild color change through to deep weeping burns.
*[[Essential oils to Avoid throughout Pregnancy]] : Pregnant women and children should consult their primary health care providers prior to using essential oils.
* [[Mucous membrane irritant Essential Oils]] : A mucous membrane irritant will produce a heating or drying effect on the mucous membranes of the mouth, eyes, nose, and reproductive organs.
* Do not store near homeopathy remedies, do not use with homeopathy or flower essence protocols, check with a qualified practitioner if you have any serious and acute health challenges.