CO2 laser treatments can be effective for improving the appearance of stretch marks by stimulating collagen production and promoting skin remodeling. However, the frequency of treatments can vary based on several factors, including the severity of your stretch marks, your skin's response to treatment, and your individual goals. For stretch marks that have been present for over 10 years, they may have undergone certain changes over time. Generally, a series of CO2 laser treatments may be recommended to achieve noticeable improvements. A treatment plan might typically involve multiple sessions spaced several weeks apart to allow your skin to heal and recover between treatments. The exact number of treatments required can vary widely from person to person. Some individuals might see significant improvement after a few sessions, while others with more stubborn stretch marks might require additional treatments to achieve their desired results. Your skincare professional, preferably a dermatologist or a licensed practitioner experienced with laser treatments, will be able to assess your specific situation and provide you with a personalized treatment plan. It's important to approach CO2 laser treatments with realistic expectations. While they can improve the texture and appearance of stretch marks, they might not completely eliminate them. Additionally, CO2 laser treatments can involve some downtime and aftercare to ensure proper healing. Before undergoing any treatment, I strongly recommend scheduling a consultation with a qualified skincare professional. They can assess your stretch marks, discuss your goals, and create a tailored treatment plan that takes into account your skin's condition and your individual needs. This will ensure that you're making an informed decision and receiving the best possible care for your specific situation.