Detailed answer

Stretch marks can form when the skin is stretched rapidly, causing the collagen and elastin fibers to break or tear. This can happen during periods of growth, such as puberty or pregnancy. The rapid stretching of the skin can cause the underlying connective tissue to become overstretched, leading to the development of stretch marks. They commonly appear as long, narrow streaks that are slightly raised and can vary in color. While they are not harmful, they can be a cosmetic concern for some individuals. Preventive measures like staying hydrated, maintaining a healthy weight, and using moisturizers can help minimize the risk of developing stretch marks.