First of all, let’s learn some concepts of the skin barrier. The physical skin barrier is composed of sebum, keratin, lipid, dermal mucopolysaccharides, and mucopolysaccharides. A healthy skin barrier can resist external harmful substances, irritants, and the entry of sunlight, as well as add moisturizing and regulating effects.
There are many reasons to damage the skin’s “protective layer”. On the one hand, genetics, improper drug use, and some skin diseases can cause skin barrier function to be weak. In addition, some factors can also damage skin barrier function. Such as cold and dry environments, ultraviolet rays and sun exposure, etc. For example, the fellow living on the plateau have thinner skin and damaged skin barriers due to long-term UV exposure.
But most girls take too much care of their skin, spend so much money on skincare, and are not willing to be exposed to the sun. Why are they still have skin barrier damage? This is related to bad skincare habits, such as repeated exfoliation and excessive cleansing.
Especially for oily acne skin, use a strong cleansing facial cleanser, or use scrub frequently. However, it is precise because over-cleaned destroyed the healthy stratum corneum, the skin barrier is naturally damaged.
Once the skin barrier is damaged, the most direct manifestation is that the skin will become dry, cause the moisture is easy to lose. In addition, to prone to dryness and desquamation, the secretion of oil on the face will become more vigorous, which will lead to aggravation of comedones and acne caused by clogged pores.
On the other hand, damage to the skin barrier will cause the skin’s tolerance or defensiveness to decrease, and show intolerance to various physical or chemical factors. For example, some people feel that their skin will become red and tingling due to wind, sun, cold or hot ambient temperature; some people even feel irritation or even rash when using products that have been used without problems before. These performances suggest skin barrier function is damaged.