What causes stretch marks?
As a result of the skin stretching in pregnancy, the elastic fibres are damaged, which causes so-called stretch marks. Other causes that promote the occurrence of stretch marks might be hormone-related or an increase in weight. Stretch marks mainly appear on the buttocks, thighs, hips, abdomen or breasts. With men they will usually show on the back or – as is the case with bodybuilders – on the inside of the upper arms.
What actually are stretch marks?
Stretch marks are minor ruptures in the subcutaneous tissue. Especially after giving birth to a child, when the skin contracts again, reddish stripes of various widths remain visible. Later on they will change into white-coloured, usually retracted scars.