The basic theory and knowledge of skin in the beauty course all say that time is ruthless, and it leaves potholes on our faces. Of course, in addition to normal aging, our usual diet will also lead to the deterioration of our skin. So have you learned the following basic theories and knowledge of skin in the beauty course?
Basic skin theory and knowledge course of beauty cosmetics 1 Basic skin theory knowledge course of beauty cosmetics
1, the definition of skin
It is the largest organ of the human body, covering every part of the body and performing important functions necessary to maintain health and beauty.
Nutrition is mainly supplied by blood and lymph.
Healthy skin is slightly wet, soft, elastic, slightly acidic, free from defects and diseases.
The thickness is 0,212-508 cm (the thinnest eye, the thickest hand and sole).
2. Definition of dermatology
It is a subject that specializes in the nature, structure, function, disease and treatment of skin.
Second, the physiological function of the skin
breathe
secrete
secrete
consciousness
regulate the body temperature
protect
absorb
Third, the physiological structure of the skin.
Epidermal single epidermis: the upper layer of the inner wall without cuticle.
Complex epidermis: stratum corneum
Crystal film layer
Granular layer
Spiny layer
grass roots
structure chart
Fourth, the physiological structure of the skin.
The inner layer of dermal skin is a highly sensitive vascular layer of connective tissue. Divided into surface layer and deep layer.
Surface layer: rich in collagen fiber and elastic fiber, which determines the toughness and elasticity of skin. It is rich in capillaries and nerve endings. The surface layer also contains some melanin.
Deep layer: including fat cells, sweat glands, blood vessels, hair follicles, lymphatic vessels, vertical hair muscles and sebaceous glands.
Verb (abbreviation for verb) The physiological structure of skin.
corium
It contains a large number of fat cells, which can be used as energy consumed by the human body. The thickness of adipose tissue varies with people's age, sex and health.
Six, the type of skin and nursing focus
Drying:
Sebaceous gland secretion is not strong, pores are small, acne is not easy to grow, water retention function is poor, and it is easy to get old. Mainly lack of vitamin a. The PH value is 5,5-6,0.
Drying and water shortage: drying and peeling. Sensitive.
Dry oil shortage: dull and dull.
Nursing focus: eat more foods containing vitamin A, such as carrots and animal livers.
Cosmetics with high moisturizing nutrients are used. As far as I can
Reduce external stimuli. Be sure to use toner and eye cream.
Seven, the type of skin and nursing focus.
Oily sebaceous glands are exuberant, with large pores, easy to get acne and thick cuticle. Not easy to age, mainly due to the lack of VB family.
Beauty course skin basic theory and knowledge 2 daily skin beauty knowledge
Know the nature of your skin.
Generally speaking, the nature of skin can be divided into five categories, namely oily skin, dry skin, neutral skin, mixed skin and allergic skin. People with oily skin usually have a shiny face and always feel greasy skin, especially in summer. People with dry skin have fair skin, relatively small pores, less oil secretion, dry skin and are sensitive to external stimuli. The cortex secretion of neutral skin is moderate, dry and oily, oily in summer and dry in winter. The face and neck of people with mixed skin are dry, while the T-shaped area which is easy to get oil is greasy. Most people have mixed skin types. People with allergic skin have dry face, easy peeling and desquamation, and often feel tight facial skin. When using various skin care products, the skin often becomes red and swollen.
After you have a preliminary understanding of your skin properties, you can choose a daily skin beauty method that is more suitable for you according to your skin properties.
Key points of various skin care
(1) People with oily skin should pay more attention to washing their faces, including washing their faces with facial cleanser with cleansing and hydrating function in the morning and evening, and washing their faces with clear water at other times. Before going to bed at night, you can choose a mask with hydrating effect to apply to your face, replenish skin moisture and balance water and oil. Try not to wear makeup. If you have to make up, it is better to use light makeup instead of heavy makeup.
(2) The focus of dry skin care is to apply moisturizing water and moisturizing milk after washing your face in the morning and evening to reduce the discomfort of facial skin. Secondly, for dry skin, skin care products should be used relatively often, such as making more night masks.
(3) Normal skin only needs primary cleaning care, such as cleaning the face in time, using a mask to maintain the skin, doing a good job of sun protection during long-term sun exposure, and not using too much skin care products to avoid the chemical substances in skin care products irritating the skin for a long time and deteriorating the skin properties. In addition, when the seasons change, we should do a good job of hydrating and moisturizing.
(4) People with mixed skin should pay attention to the oil production in the T-shaped part, and do a good job of cleaning and hydrating to prevent acne and acne in the T-shaped part. Once you have acne on the T-shaped part, don't squeeze it, otherwise it may pollute the surrounding skin and leave acne marks.
(5) Sensitive skin should pay attention to avoid sun exposure, wind blowing and other sensitive stimulating factors, and pay attention to strengthening skin maintenance during seasonal changes to reduce skin discomfort. When choosing skin care products, we should pay attention to choosing mild ones and try not to wear makeup to avoid skin allergic reactions. Seafood, shellfish and other foods should also be eaten less, because these foods are easy to cause skin allergies.