Stretch marks develop when skin stretches rapidly during growth spurts, pregnancy, or significant weight gain, forming fine, streak-like scars. Common in both men and women with no major health risks, they affect 80% of women overall. During a first pregnancy, 50-70% of women notice them by the end. Primarily appearing on the abdomen, buttocks, breasts, upper arms (biceps area), knees, and thighs, stretch marks remain a common concern amid myths and misconceptions.
