Laser application: 1, the most common tattoo and eyebrow tattoo and eyebrow tattoo: artificial way to plant pigment in the dermis, or accidental injury caused by pencil lead, iron, etc. into the skin. Generally only a few laser treatments can solve the problem. 3045 Q dual-wavelength medical laser cosmetology instrument output 1064 nm and 532 nm two wavelengths, 1064 nm Q laser penetration is strong, can reach the deep skin melanin cells or black, blue dye particles; 532 nm Q laser can be well absorbed by the black, red pigment, can be effective to get rid of black, red pigment. The 532 nm Q-modulated laser can be well absorbed by the black and red pigments and can effectively get rid of the black and red pigments. 2. The principle of laser treatment is that the laser instrument produces a high intensity light beam and different types of lasers can produce different colors of light. The flesh color of the laser is the key to the treatment. Different colors of laser light are absorbed by different colors of skin and the laser energy is used to make the dye particles disintegrate and vaporize, sealing the blood vessels, and then the dye particles are absorbed by the body to be eliminated from the body, and the pigmentation will then fade away. Since a certain wavelength of laser light is only absorbed by the corresponding color of pigment. Only the diseased cells absorb the specific laser light, while the normal skin tissues are not damaged, so there will be no scars. Advanced laser technology also controls the depth of skin reached by the laser, and adjustable pulses minimize skin damage. The skin usually returns to normal within 7 to 10 days and does not affect people’s normal life. During the operation, the time being treated is only a few minutes at a time, up to a maximum of ten minutes. After each treatment, the skin has to have a metabolic process of natural absorption, so the interval between treatments is usually 2 to 3 months. According to the size, quantity and depth of pigment and vascular lesions, some treatments can achieve the expected results in one or two times, and generally need 4 to 6 times to solve the problem completely. 3, laser treatment of cosmetic features 1) does not damage the skin, hair follicles, does not produce scars, only remove pigment. (2) Can remove drugs and other methods failed to get rid of the pigment. 3）Small pain, no need for anesthesia. 4）Fast recovery, little impact on normal work. 5）Cold light sterilization, no cross-infection, no need for special care after surgery. 4.Preparation before laser treatment 1) Do not have all kinds of inflammation in the treatment area. 2) During menstruation and pregnancy, laser treatment is prohibited. 3）Clean the treatment area, if necessary, you can do deep cleaning, and then the treatment area is sterilized. 4) Sensitive areas such as eyeliner, lips before the operation to apply anesthetic 20 minutes before treatment. Shave and disinfect the affected areas with hair. (5) patients must be photographed before laser treatment, in order to compare the effect of laser treatment 5, laser treatment time and interval: laser treatment of pigment particles after the fading of the discharge time is generally in 3-6 months or so. Due to the different pigmented diseases of pigment particles size, type, depth, color and personal skin color, metabolism, age and other individual differences, laser treatment of pigment particles after the fading time and degree of discharge are also different. The lighter the lesion, the younger the age and the earlier the treatment, the better the effect. Generally speaking, freckles, sun spots and other superficial pigmented diseases need 1-2 times, wrong eyebrow tattoo needs 3-4 times, amateur tattoo needs 4-6 times. Professional tattoos require 8-10 times, and deep pigmented diseases such as nevus of Ota require 5-6 times, with an interval of 2-3 months between each time. Laser treatment of spots, moles, etc., the skin will have a natural recovery process, just like a normal pregnancy must be carried in October before delivery, which no one can overcome. After laser surgery, initially, there may be black scorching dementia, 1-3 days later, there is slight redness, swelling and oozing of the wound (especially in the orbital area or the wound with a large area of cauterization), a small number of blisters may appear, and then drying dementia, 10 days to 2 weeks, dementia peeling off the skin and healing, healing, a small number of patients will appear atrophic scars or hypertrophic scars. Dye laser treatment healing skin surface can appear white, then red, or light coffee color, 3-9 months after the pigment gradually close to the skin color. The younger you are and the better your skin condition is, the faster you will recover. Therefore, after laser treatment, we should wait patiently, do not be impatient and seek trouble. In principle, do not scrub with water within two weeks of laser treatment. Protect the wound clean, can use some lubricating drugs, if necessary, local use of antibiotic ointment. It is forbidden to remove the scabs at an early stage and let them fall off by themselves. In addition, must avoid direct sunlight ultraviolet radiation. Some patients may have reddish local skin color after treatment, followed by pigmentation, depending on individual circumstances, the pigmentation will gradually subside after 1-6 months. 1-3 days after laser scar treatment, there will be redness and a small amount of ooze in the treatment area and surrounding tissues, and you may feel swelling and numbness. Later, the redness and swelling will gradually subside and the scab will heal in 1-2 weeks. Laser hair removal can be accompanied by a little tingling or a slight burning sensation. Most patients describe the sensation of being treated, and most describe their treatment as feeling like a rubber band popping, without the need for anesthesia to remove the pain. After the treatment, the skin in the treated area may appear reddish in color, like the sensation of being exposed to the sun, and since the laser treatment does not damage the skin, no bandages or special care is needed. Due to the complexity of various pigmentation problems, in order to protect normal skin, some pigments need to be treated in stages, such as nevus of Ota, chloasma and dermal spots, mixed color tattoos, etc., with intervals ranging from 1 to 2 months. 6, laser treatment after care 1) treatment may appear slight pain, can also appear brief redness and swelling and other reactions, will disappear on its own. 2）Scabs will fall off in 7-14 days and the wound will heal. Individual patients may have normal temporary hyperpigmentation after surgery, which will be gradually absorbed. Oral vitamin C can reduce pigment reflux. 3) During the healing period, antibacterial ointment or oral anti-inflammatory drugs can be applied to prevent secondary infection. Avoid direct exposure to ultraviolet rays of the sun. Otherwise, transient hyperpigmentation will occur and scars may appear after infection. 4) No contact with water, no make-up, no rubbing on the treated area before the scabs fall off, avoid spicy, smoking and alcohol. In the near future, abstain from eating dark-colored food such as: coffee, Pepsi, etc., to let the scab fall off by itself, shall not be forced to peel off. Do not participate in intense exercise, so as not to cause infection after sweating. (5) Where pigmented skin disease treatment, must pay attention to sun protection, pigmentation is a slow biological process, generally 1-3 months, during this period must continue to sun protection. In order to obtain the best results, must be repeated treatment, the interval should be more than 3 months. (6) According to the nature of the lesion pigmentation depth and location, certain types of treatment may have to be carried out several times. 7) After the treatment, if there are no special circumstances, you can come to our center for follow-up once every 2-3 months. If infection or other conditions occur, please come to our center for follow-up in time. It is advisable to sleep with a higher pillow to reduce swelling of the face (the treatment area is on the face). If the treatment area is around the eyes, if the eyelids are swollen, you can apply ice packs to the affected area or do forceful eyelid opening and closing exercises to reduce the swelling. Do not use other medications or cosmetics until the scabs have fallen off to avoid inflammation of the affected area. After the scabs fall off, you can wash your face normally, and the parts that need to make up the color, such as eyebrows, can only be made up after three months. 7, the precautions of treatment: 1) Through laser treatment may be once or more times to make the pigment disappear or reduce. (2) Laser treatment is carried out on the superficial surface, and usually no scar appears. 3）Pigmentation changes may appear in the short term after laser treatment and will disappear after several months. (4) Within two weeks of treatment, scrubbing is not recommended in principle. 5）Small area treatment will only show slight swelling in the local area. Large area treatment, especially around the eyes will appear obvious swelling, three or five days after the disappearance of their own. (6) after laser can have mild redness and swelling, light brown scab, should pay attention to wound protection, clean available some lubricating drugs, prohibit early to scab, let fall off by itself. (7) about half a month after the operation for special mask treatment. (8) the treatment area is more sensitive to sunlight, so the treatment should be avoided within three months after sun exposure, if necessary, it is appropriate to use sunscreen lotion. (9) Avoid sunlight for three weeks before the treatment, so as not to impede the effect of the treatment. 10) Aspirin and other medications should be avoided for a week before laser treatment to prevent easy bleeding. In addition, there are two other situations that require special attention: ① The patient is a keloid, there is a possibility of leaving unsightly scars, laser treatment should be done carefully, once the problem occurs, go to the doctor to seek active treatment. ② patients with hyperpigmentation spots, if due to endocrine factors, laser removal may be “resurgence”, this patient needs to be combined with other treatments, adjusting endocrine disorders, the use of color-reducing drugs, take a larger dose of vitamin C, eat more fruits, etc. After a period of time, most of the skin tissue can be restored. After a period of time, most of the skin tissues can return to normal, superficial scarring can be smoothed out, pigmentation spots subside. But for some deeper in, area and larger spots, moles, laser may leave scarring or pigmentation, these are the lovers in the laser treatment before careful consideration. 8, contraindications 1) skin cancer patients. 2）Developmental abnormal nevus, malignant nevus and so on. 3) Scar body. (4) Acute skin or taking photosensitive drugs. 5) Photosensitive skin or taking photosensitive drugs. 6) Coagulation disorders or taking anticoagulants. 7) Immunodeficiency. 8) Psychological disorders and pregnant women. 9) Skin lesions related to melanoma (e.g., developmentally abnormal moles, malignant nevi, etc.); 10) Treatment is not recommended for customers who are unwilling to risk minor scar formation; and for those with hyperpigmentation or dark spots caused by inflammation and medications (including cosmetics).