Stretch Marks (Striae):
Teen information

Stretch marks are usually seen on the belly and breasts during pregnancy; the thighs and lower back of teen men; and the thighs, buttocks, and breasts of teen women. They are common on the shoulders of bodybuilders. Stretch marks may be widespread or occur in other locations in people who are using corticosteroids or have an underlying disease.

Stretch marks change in appearance with time. Early on, they are faint pink, appearing in a line, or they are parallel band-like marks, which might be slightly itchy. Stretch marks gradually enlarge and become red to purple, often with a wrinkled surface. Finally, they become white, slightly flatter (depressed), with a crepe-paper appearance of linear marks 1–10 mm wide and many centimeters long.