Stretch marks are a very common concern, affecting most adult women as well as men and teenagers, and can affect all skin types. Also known as ‘striae’, they technically a form of scarring, characterized as indented streaking across the surface of the skin; common shapes and patterns of stretch marks lead to them being commonly referred to as ‘tiger stripes’. Usually, they are red or purple-hued when they first appear and fade to a silvery white over time.