With the improvement of people’s living standards, people have not only concern about physical health, but also want to stay young and beautiful forever, but in recent years, the incidence of sensitive skin is increasing, in the end what is the cause of it? Let’s first look at what is sensitive skin. Sensitive skin refers to a state of hyperreactivity after the skin is stimulated, mainly in the face, clinical manifestations of physical, chemical, mental and other factors stimulation of the skin prone to burning, tingling, itching and tightness and other subjective symptoms, with or without erythema, scaling, capillary dilation and other signs. The causes of sensitive skin are complex, and the causes of sensitive skin are not fully understood, but may be related to the following factors: 1. Recent studies have found that sensitive skin is related to genetics, with a higher incidence in women than in men, and a higher incidence in young people than in older people; the menstrual cycle can also affect the sensitivity of the skin; mental stress and emotional excitement can cause the release of neurohypophyseal peptides, which can lead to sensitive skin. (2) External factors: cosmetics (such as products containing fruit acids, salicylic acid, vitamin A acid, glucocorticoids), cleaning products (soap, detergent, etc.), disinfection products, air pollutants, decoration materials, etc. (3) lifestyle: such as spicy and stimulating food, alcohol can aggravate the skin reaction; (4) medical factors: such as the long-term use of large amounts of external glucocorticoids, external irritant drugs, certain laser treatment after surgery, etc. 3, sensitive skin can also be secondary to certain skin diseases, such as atopic dermatitis, seborrheic dermatitis, rosacea, contact dermatitis, acne, eczema, etc.