Stretch marks, or called: striae, are a common skin condition that occurs when the skin is stretched rapidly, such as during pregnancy, rapid weight gain or loss, and muscle building. They appear as linear, discolored lines or streaks on the skin, and can affect both men and women.
Modern treatment options for stretch marks include:

Topical treatments: Topical treatments such as creams, lotions, and gels containing retinoids, hyaluronic acid, and glycolic acid can help to improve the appearance of stretch marks by stimulating collagen production and increasing skin elasticity.

Micro-needling: Micro-needling, also known as collagen induction therapy, is a procedure that involves creating tiny punctures in the skin with a micro-needling device to stimulate collagen production and improve the appearance of stretch marks.

Laser therapy: fractional laser therapy, such as Fraxel, can help to improve the appearance of stretch marks by stimulating collagen production and promoting skin resurfacing.

Surgery: surgery, such as tummy tuck and body lift, can remove the excess skin caused by stretch marks and improve the contours of the body.

Topical camouflage: certain topical camouflage like makeup can be used to cover stretch marks and improve the appearance of the skin.