Try Rubbing a sugar scrub on the skin which will exfoliate the area by mixing one cup of sugar with 1/4 cup of a softening agent, like almond oil or coconut oil, before mixing to the consistency of wet beach sand.
Then Add some lemon juice. Scrub the mixture on the part of your body where the stretch marks are.
Target also sells some stretch mark oil called Shea Moisture Mommy Stretch Mark Intensive repair oil.