What is a skin barrier?
The skin is the largest organ of the human body, playing the role of the body's "bulletproof vest", helping the body avoidInvasion of bacteria, dust, irritation, etc. from the outside also protects the body from material loss. Skin mostThe outer layer is called the stratum corneum. The stratum corneum consists of 15-20 layers of flat keratinocytes, and the cellsFilled with various lipid components, this structure of the stratum corneum is called the "brick wall structure" and canResist the invasion of various physical, chemical and biological harmful factors to the skin from outside, and preventEndogenous substances, including water, are lost from the epidermis. The skin barrier function is incomplete or When destroyed, its absorption of external chemicals increases, and the nerve endings are less protected.Increased transcutaneous water loss (TEWL) is one of the causes of skin sensitivity, which is easy to cause seborrhea Dermatitis, rosacea, rosacea, recurrent facial dermatitis, facial eczema, etc.