Types, principles and how to choose beauty instrument; beauty instrument is a kind of equipment that uses physical, electronic and optical methods to give people beauty. 1) Current and electric pulse mode: Micro-current pulse modulation technology is used to act on human skin, meridians and acupoints to achieve the purpose of firming skin, eliminating wrinkles and beauty beauty. 2) Micro-vibration mode: mechanical vibration and voltage stimulation are used to tighten human skin, increase its elasticity and enhance the metabolism of skin cells. 3) Various colored light irradiation methods: the different action mechanisms of various colored lights on skin tissues are used to improve the human skin condition. 4) Method of raising body temperature: Use equipment to raise body temperature and accelerate human metabolism, namely wax melting machine and red light irradiator. 5) Microwave equipment: Microwave can penetrate deep subcutaneous tissue, drive cells to contract, and achieve the effect of beauty and compactness. 6) Vacuum adsorption type: This equipment uses special adsorption tools to act on human skin, and sucks up human skin through vacuum. With the movement of tools on the body, it can realize the functions of squeezing, massaging and exercising, detoxifying, firming the skin and increasing the vitality of tissues and cells. 7) Laser therapy: the thermal energy of laser is used to destroy skin epidermal cells, which is mainly used to remove spots, moles, coverings, scabs and boils. 8) Ultrasonic mode: Using the characteristics of high-frequency vibration of ultrasonic waves, it acts on human skin to make the skin produce high-energy movement and achieve the effect of shrinking the skin. 9) Water bath therapy: Use the affinity of water flow and water temperature with people to achieve the purpose of whole body beauty. 10) strong light beauty: the use of strong light on the skin shows that it produces instantaneous high temperature, which plays the role of fading spots and removing red blood. 1 1) magnetic field mechanism: the use of electromagnetic fields or permanent magnet high-energy magnetic fields has a cosmetic effect on the human body. 12) radio frequency action: high-frequency shock wave is used to act on the skin surface, which makes the skin shrink and achieve the effect of wrinkle removal and skin tightening. 13) electronic introduction: through the physical penetration of electronic current, related beauty products and drugs are introduced into the skin to achieve the beauty effect. 14) Fumigation cosmetology: It can be divided into two modes: cold and hot. Beauty products and drugs are evaporated into gaseous form through special equipment and infiltrated into skin tissues, thus achieving the cosmetic effect. 15) pure oxygen permeation: oxygen is added to a certain pressure through special equipment, which acts on human skin tissue and increases the oxygen uptake of cell tissue.