The formation of stretch marks is mainly due to the increase of glucocorticoid hormone secreted by adrenal cortex during pregnancy, its decomposition of elastic fiber protein, so that the elastic fiber denaturation, coupled with the late pregnancy due to the increase of the uterus, so that the skin tension of the abdominal wall increases, the elastic fiber of the skin breaks, so that stretch marks appear. If you want to prevent stretch marks, you can eat more collagen-rich foods, such as meat skin, meat skin boiled jelly, pig’s feet and other collagen-rich foods, or directly supplement collagen, such as collagen powder, collagen tablets, etc. Also increase the elasticity and softness of the skin, commonly used such as olive oil, special oil to prevent stretch marks, applied to the abdomen, buttocks, thighs and other parts prone to stretch marks, at least 3-5 times a day, and then massage to absorb. The most important prevention is to control weight, do not suddenly gain a lot of weight, if suddenly become fat, very easy to appear stretch marks.