While chronic scars are often best treated with other modalities, (revision, laser, etc.) for scars that are raised and/or red, old scars may improve with topical scar therapies like Biocorneum. Best wishes.
Biocorneum is a medical grade topical silicone that is useful for healing incisions to create a softer, smoother scar line. Usually, it is most efficacious at the 2-6 week period after surgery. However, it can be useful for up to 6 months - 1 year. After that, I would recommend other modalities to help improve scarring. This could be microneedling, dermabrasion, tattooing, or even re-excision and closure. Hope this helps!