Stretch marks 6 months after BBL, how can I treat them without compromising my very expensive BBL? (photos)

Thank you for your photos of your awesome results! Unfortunately, stretch marks are permanent once they are there, but there are treatments out there that can lighten and soften their appearance. With proper treatments you may be the only person to know they are there unless pointed out. I would recommend finding a laser institute in your area that treats stretch marks to ensure you have the best results once they are healed. 

I wish you the best of luck! 

Your BBL looks great first off! As for the stretch marks you can use creams meant to treat them that can soften their appearance and lighten the color. You also can also research reputable laser treatments in your area for stretch mark treatments. They as well can improve the texture and appearance of your stretch marks. Best of luck,