Stretch marks are caused by a combination of factors, including rapid growth or weight gain, hormonal changes, and genetics. When the skin is stretched rapidly, the collagen and elastin fibers in the dermis layer of the skin can become damaged, leading to the formation of stretch marks. Hormonal changes, such as those that occur during puberty, pregnancy, and bodybuilding, can also contribute to the development of stretch marks. Additionally, genetics can play a role in determining whether someone is more susceptible to developing stretch marks.
Stretch marks occur when the skin is stretched too quickly due to rapid weight gain or growth. This causes the collagen and elastin, which give skin its elasticity, to break, resulting in small tears in the skin. In response, the body produces scar tissue in order to heal the tears, which appear as thin, red or purple lines on the skin. Stretch marks can also occur during pregnancy, due to hormonal changes, or as a result of certain medications. They can also be hereditary