Old stretch marks can improve, but 13-year-old marks are considered mature striae alba, meaning they are usually pale, slightly indented, and more resistant to treatment than newer red or purple marks. Complete removal is not realistic, but meaningful softening of texture, depth, and contrast is possible with the right expectations. Over-the-counter creams, oils, cocoa butter, and vitamin E can moisturize the skin but will not substantially remodel long-standing stretch marks. Prescription tretinoin may provide modest improvement in texture for some patients, but it is generally more effective for newer marks and should not be used during pregnancy or breastfeeding. For older stretch marks, procedures that stimulate collagen are typically more worthwhile. Microneedling, radiofrequency microneedling, and fractional laser resurfacing can improve texture and blending over a series of treatments. I commonly recommend three to six sessions, spaced about four to six weeks apart, with continued remodeling for several months afterward. Combination treatments may provide greater improvement than a single approach. The best option depends on the location, skin tone, depth, and whether the marks are white, red, raised, or depressed. Darker skin tones require careful device selection to reduce the risk of pigment changes. Maintaining a stable weight, moisturizing, and using sunscreen on exposed areas can help minimize contrast, although they will not erase established marks. An in-person consultation allows treatment to be tailored safely to your skin and goals.