Stretch marks are visible fine lines that occur on the skin after puberty and post pregnancy. It also appears on the skin due to sudden weight gain and intake of certain medications. The main reasons for stretch marks are physical stretching of the skin during pregnancy, hormonal changes during puberty, heredity.
If the skin tissue expands beyond its ability, it tends to get stretch marks. Also, stretch marks can appear on your waist line, breast, thighs and lower backs. Generally, women try to reduce and fade the appearance of stretch marks using some skin care products that are not so effective.