Stretch marks occur when skin tears due to excessive forces upon the skin. The process of pregnancy, weight gain, and growth spurts can cause stretch marks. Steroid and hormonal changes can also weaken the bonds between the cells of the skin and can make stretch marks occur more readily.
Areas of Occurrence: Stretch Marks
Stretch marks usually occur in areas involving the breast, abdomen, thighs, groins and buttocks. They are initially red or purple, but, as time progress, often lighten.