Sensitive skin is skin that reacts frequently and excessively to different types of stimuli or aggression. This sensitivity can affect any area of the face or body, although it is generally limited to a few areas of the face. You may only have sensitive cheeks, for example.
Like dehydration, skin sensitivity is a tendency, i.e. a transient but recurring phenomenon (even cyclical in some people). Skin can therefore become more sensitive than usual from one day to the next, under the influence of various factors.
