isotretinoin 40 mg is primarily used to treat severe acne, but it does not directly remove acne marks or scars. By reducing oil production, shrinking sebaceous glands, and minimizing inflammation, isotretinoin prevents the formation of new acne lesions, which indirectly reduces the likelihood of future scarring. While it may improve skin texture and tone, existing scars or marks typically require separate treatments, such as chemical peels, laser therapy, or microneedling. For optimal results, consult a dermatologist to discuss combining isotretinoin with other treatments tailored to your skin's needs. Consistent sun protection is also essential to prevent darkening of acne marks.