Most stretch marks occur on the abdomen, breasts, buttocks and bilateral thighs of pregnant women, with abdominal stretch marks being the most common. Stretch marks are a kind of swelling lines, which are caused by the breakage of the dermis in the middle and late stages of pregnancy due to the rapid increase of the abdominal circumference in a short period of time and the slow growth of the skin. In the early stage, there will be dark red or purplish-red stripes, and after delivery, there will be gradual loss of pigmentation, skin atrophy, and finally stabilize into white or silver stripes. Stretch marks are mostly found on the abdomen, but may also appear on the chest, back, buttocks, and proximal extremities. They are very common in pregnant women, and once they occur, they last for life, bringing a greater psychological burden to pregnant women. Stretch marks for pregnant women have no health effects, generally do not need special treatment, if you feel the impact of aesthetic, you can choose to laser, chemical peeling and other cosmetic means of skin treatment, which is conducive to lighten the stretch marks. However, it is recommended to go to regular medical institutions to avoid adverse consequences.