Up to very recently, stretch marks were pretty much untreatable no matter what method you tried. The Carboxytherapy Treatment is gaining in popularity and showing great promise by softening stretch marks by increasing the blood flow to the stretch mark areas and allowing them to constrict and contract, thus blending them better with the surrounding healthy skin. Injecting very small amounts of carbon dioxide gas just below the surface of the skin, the procedure tricks it (the skin) into increasing blood circulation in the treated area. Carbonxytherapy causes the formation of new collagen and subsequently thickens the skin to improve the appearance of the stretch marks by rebuilding the collagen matrix.