Im African American with White Stretch Marks on my Breast What Can I Do?

Im 5 feet tall and I've lost 20 pounds. Im now at 133 pounds and plan on losing 25 more pounds. I think because of my weight loss caused me the get these disgusting stretch marks. But im going to get laser treatments for them. But I want to know after my laser treatments if I lose another 25 pounds will they come right back? Pleas help and other info im darker skinned and had these stretch marks for about 5 years.

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