blue clay helps to stimulate the circulation when applied, so you may note some tingling on application. this should dissipate within a few minutes. some people are very sensitive to essential oils, and in this case, we recommend leaving the jar open for a few minutes prior to using the masque. the essential oils added to the masque are in very small quantities (less than 1% in total), and are all “top notes”, which means that they will dissipate rapidly. if your skin remains sensitive, try activating with milk or aloe vera to reduce any tingling. your skin may appear slightly red for a few minutes after removing the masque, but this will resolve.