Old, white stretch marks (striae albae) are mature scars, meaning they are challenging to fade completely, but their appearance can be significantly improved. For topical options, prescription retinoid creams (such as tretinoin) can help rebuild collagen, though they must be avoided if you are pregnant or breastfeeding. For more noticeable results, in-office medical treatments are highly effective. These include microneedling, fractional laser therapy, and microdermabrasion, which stimulate deep collagen production and smooth skin texture. I highly recommend consulting a dermatologist to safely determine the best treatment plan for your skin type.