Atrophic lines are red, white or purple streaks of broken skin fibers that occur in the body during pregnancy, fitness and sudden weight gain. It also includes obesity lines, exercise cracks, and movement in areas of the body where there is a lot of movement, such as the inner and outer femur, knees, hips, and lumbosacral areas, in addition to the abdomen. Atrophic lines can be caused by weight loss, obesity when fat deposits make the skin expand, when weight loss, the expanded skin atrophy, thus appearing some patterns; expansion lines are formed because the bones and muscles grow too fast, more than the speed of the lengthening of the skin, the elastic fibers of the dermis are pulled off. It is a physiological phenomenon that occurs during the development of healthy male and female adolescents. The appearance of atrophy lines during puberty is usually after the growth of pubic hair, and most of them appear at the same time as “acne”. In males, they appear mostly on the inner and outer thighs and waist, while in females, they occur mainly on the lower abdomen, legs, and breasts. Atrophic lines are initially slightly higher than the skin surface, and then gradually become irregular stripes or band-like skin depressions arranged in parallel, the skin at the depressions becomes thinner, the surface is shiny, up to several centimeters long, about 1 cm wide, the color is mostly light red or purple. Atrophic lines are not painful or itchy, and there is no other discomfort, so there is no impact on health. Stretch marks are also a type of atrophy marks, which are purple or pink stripes that appear on the lower abdomen, thighs, buttocks or breasts during pregnancy. During pregnancy, as the fetus grows and the amniotic fluid increases, the pregnant woman’s uterus gradually expands. Due to the endocrine changes during pregnancy, the elasticity (fibers) in the skin is weakened and brittle, and the walls of the capillaries and veins under the skin become thinner and more dilated. After the fifth month of pregnancy, the uterus grows larger and larger, and the breasts grow due to the development of breast tissue and the deposition of fatty tissue, resulting in the thinning of the skin of the breasts, abdomen and upper thighs and the breakage of elastic fibers. Stretch marks are formed. Stretch marks are a physiological change that causes mild localized pain and itching, but they are not harmful to health. Prevention of Stretch Marks: During pregnancy, there are some conservative ways to treat stretch marks, which can be done in terms of diet and lifestyle habits. First of all, take more vegetables and fruits, protein and fiber in your diet. And high-calorie, high-fat food should be reduced intake, away from sweets and fried products, to avoid taking too many sweets and fried things, should take a balanced nutrition, it can improve the skin texture, and help the skin look more elastic. At the same time more walks slowly, in order to reasonably control weight, pay attention to maintain a happy mood. This not only enhances physical fitness, but also plays a role in the prevention of stretch marks stretch marks. The treatment of stretch marks (atrophy lines, obesity lines, fracture lines): especially mild can try to choose to supplement collagen (external hyaluronic acid), wear body-shaping underwear and other methods, limit the intake of sugar, eat more fiber and protein, or use some good quality repair factor, epidermal growth factor or essential oil massage can play a certain role in alleviating. For those who have moderate to severe scars and are concerned about the appearance of their image, they should consider going to a regular hospital for proper treatment. The treatment method is basically the same as the minimally invasive treatment for scars. The traditional one is usually treated with fractional laser (exfoliative, non-exfoliative), and now the new technology is fractional radio frequency, but my personal experience is that I prefer a variety of technologies combined treatment, choosing different devices according to the actual situation, or combining two or three different devices for simultaneous treatment. Unlike traditional fractional lasers, fractional RF uses an electrode to deliver electrical wave energy (non-laser light wave energy) and produce an electrical field that passes through the skin’s surface into the subcutaneous tissue. At high frequencies, the natural electrical resistance of the subcutaneous tissue moves to produce heat energy, and this energy causes the collagen in the dermis to deform and contract to achieve the treatment effect. Fractional RF was first used for the purpose of skin tightening and wrinkle removal, and then as the number of hospitals using it increased, many new functions were gradually developed by everyone, and now everyone gradually agrees that it has better efficacy for scars, acne pits, enlarged pores, stretch marks, atrophy lines and these. Fractional RF is a non-invasive treatment method, and is now ing a safer and more effective method than the traditional laser. Unlike the light wave of laser, RF wave is not absorbed by melanin when penetrating the barrier of epidermal basal melanocytes, so it can heat the collagen fibers of dermis to 55℃-65℃, and the collagen fibers contract and stimulate the dermis to repair again more powerfully than traditional laser. Moreover, compared to laser, the duration of action after RF treatment is much longer. Even 2-6 months after treatment, after the stimulated collagen tissue gradually completes the regeneration process, most of the treated patients can still see that their skin is firmer and more delicate than a few months ago, while the effect of laser is usually maintained for only 2 months. My personal experience is to use non-ablative fractional laser or fractional RF for fresh red stretch marks or atrophy lines, while for old, whitened stretch marks or atrophy lines, I generally prefer to use ablative ultra-pulse fractional to open the surface channel first, and then use fractional RF to do deeper treatment at the same time. Of course, whether it is fractional laser or fractional radiofrequency, after the treatment, the absorption channel of the skin is opened, and the post-operative medication can be used in time to get twice the result with half the effort. According to my personal experience over the years, if you want to treat stretch marks or atrophy lines, the earlier you treat them, the better the results. According to my own rough statistics, realistically speaking, generally if the onset of treatment within six months, the efficiency may reach 80-90%, but with the passage of time, the efficiency will slowly gradually reduce, the onset of more than three years to start treatment, then the general efficiency is only 30-50%.