Stretch marks aremicro-lesions, visible on the skin's surface, very common and comparable to scars that affect many people, both women and men, although they are more frequent in women. Stretch marks are located on certain parts of the body such as the thighs, abdomen, buttocks, hips, and chest, the lower back, upper arms, and the inner side of the knees. They appear on the skin aselongated lines or streaks, often purplish at first, then pink, and finally pearly white.
The depth and color indicate the stage of stretch mark evolution. Indeed, we can distinguish two phases:
The acute/inflammatory phase which is characterized by reddish-purple lesions with a somewhat raised appearance at the time of their formation, due to the dilation of blood vessels, and which can be, in some cases, symptomatic either painful or irritating.
The chronic/scarring phase is characterized by hypopigmented (white) streaks and is asymptomatic.
During pregnancy, stretch marks are primarily caused by a rapid stretching of the skin, which disrupts and disorganizes its structure. This sudden stretching leads to a breakage of collagen fibers and triggers the formation of stretch marks that resemble cracks on the skin's surface. Stretch marks are typically located on parts of the body that can gain volume such as the thighs, breasts, hips, and particularly the abdomen during pregnancy. Stretch marks are common during this period, especially in cases of early pregnancy, rapid weight gain, a large baby, or a certain position of the uterus.