There are many factors causing skin sensitivity, including age, endocrine and other internal factors, as well as external factors such as pressure, bad mood, drinking, spicy and stimulating diet. Among them, over washing is a very common and important cause of skin sensitivity.
The outermost layer of our skin is the cuticle. There is a layer of sebum membrane emulsified by sweat and sebum, which provides protection for the human body. Excessive cleaning and improper use of cosmetics (such as alkaline soap wash face), not only remove the dust, aged horniness and microorganism on the skin surface, but also destroy the normal sebum film, which can not achieve the purpose of skin care, but will damage the skin instead.
Especially for people with oily skin (such as acne), they always want to wash off all the grease on their face in order to improve the symptoms of hair follicle blockage and acne. However, this will make the skin more oily. Because the local environment of skin also has feedback regulation, the sebum membrane can inhibit the secretion of sebaceous glands. Excessive cleaning causes the loss of sebum, and the pressure of the sebum membrane to inhibit the secretion of the sebaceous glands is reduced. On the contrary, the speed of the secretion of the sebaceous glands is increased, and more oil will be secreted, resulting in a glossy face.
Excessive cleaning will also cause damage to the skin barrier function, increase the skin water loss rate, lack of water, dryness and roughness; the protection is weakened, harmful microorganisms, external chemical, physical and biological factors are easy to invade or stimulate, especially vulnerable to UV damage, and tingle when using skin cleaning and cosmetics.
For people with sensitive skin, it is recommended to use 36 ℃ ~ 37 ℃ water which is close to the body temperature to wash the face, so as to avoid cold and hot irritation to the skin; use mild soap free skin cleaning products; try not to use exfoliating products, select medical skin care products and physical sunscreen which do not contain spices, preservatives, and are less irritating; pay attention to the law of life and relax the mood.