Orange and Citrus oils should not be used in skin applications as they are photo sensitizers. From: http://www.naturesgift.com/warnings.htm The following oils can cause severe sun damage (photosensitivity.): Bergamot, expressed Lime and Rue, very strong, Cumin, Mandarine, Lemon, Tangerine, Orange, Verbena (moderate), Angelica, Caraway, Cassia, Cinnamon Bark, Grapefruit, Honeysuckle absolute, Laurel Leaf Abs., Patchouli (mild), Virginia Cedarwood, Dill weed, and Petitgrain (very mild.)