Generally speaking, unmarried women, there is no stretch marks, but too much obesity, sudden weight gain or by the influence of puberty hormones, some women will also be in the case of childbearing, similar to the stretch marks of the atrophic lines, and even some pathologic factors, such as adrenocortical hypogonadism, a huge ovarian tumor resection, a large number of ascites subside, and so on, there may be a similar pattern of skin. According to foreign survey statistics, in the 10-16 years old girls, 70% can appear shrinkage lines, in not fat girls, there are also 35% of people will appear shrinkage lines. What in the end is the cause of stretch marks? The exact cause of stretch marks remains a mystery at this point in time, but researchers suspect that rapid overstretching of the skin is the main cause of stretch marks, as well as specific hormonal conditions such as pregnancy, puberty or weight fluctuations, which can also cause some people to develop atrophic lines such as stretch marks, which are not only found in women, but can also occur in men as well. During pregnancy, the increase in glucocorticoids secreted by the adrenal cortex can reduce the elasticity of the skin to the point that brittle elastic fibers tear when tension increases, and while the local skin shrinks and thins, the walls of capillaries and veins in the dermis also dilate and thin, making it easy for the color of the blood to be revealed, so stretch marks are usually pink or purplish red in color. Under the hormonal conditions mentioned above, stretch marks can be avoided and minimized, but for some people who are particularly prone to stretch marks, it is not possible to completely prevent them from arising. And, once they have developed, there is no treatment that can make them disappear completely. Stretch marks are essentially a scar from the inside out, and the methods of improving them are the same whether they are on the legs or the abdomen, including lasers, olive oil, vitamin A acids, and silicone gels, to name a few. A recent study suggests that topical improvements can also be made with the use of topical silicone gels. Laser treatments currently play a more effective role in removing stretch marks, especially non-ablative fractional lasers, which can basically chip away after 4 or 5 treatments. However, the treatment effect is faster and better in the early period after childbirth. Our department introduces Paloma Lux1540 non-exfoliative fractional laser produced in the United States to have good effect on the treatment of stretch marks, which does not affect the work and recovers fast, and its application for 2 years has been highly praised by everyone. In addition, pay attention to a balanced diet, control weight gain, pay attention to exercise and enhance skin elasticity. Be sure to use a belly band during pregnancy to prevent excessive burden of gravity on the abdomen and slow down excessive stretching of the skin.