Hi hun. I’ve had stretch marks since I was teenager(I’m 27 now) Unfortuntately once they appear, there’s not a massive amount you can do about it! However they will not stay purple/red forever. They will fade and change colour to a silvery white colour that’s so faint, you can hardly see them! That’s what mine are like on my boobs, and you can barely see them, I just have one slightly fatter one on my right boob, on the top that’s slightly more noticeable more on pictures, but hardly at all in real life…keep using your bio oil or cocoa butter and just let time pass till they fade.
There’s not much you can do to prevent them, if your skins prone to them, it’s just the risk we take
I’ve had my boobs done and fortunately I didn’t develop any new ones! xx