I used Mederma on a rather large dog bite scar on my daughter's face after talking to her doctor nad the pharmacists. My train of thought was I would try this to hopefully make some difference so that we can wait a while until we talk about plastic surgery- she was only 3 when it happened and the Dr. said that you have to wait at least a year for the wound to heal through all layers. Anyway, we used it very diligently, like the tube says, a couple of times a day for about 10 months. while I do notice the scar has much less color, it is still visible and the area that it's in is hard to massage, so it is still slightly raised. I do not know if the Mederma actually had much of an effect on it or if it was just time, but I did notice that after using the product for a few months, a small eczema like rash started, right around the wound- which was already 4 months old at that point. The Dr. could not determine whether the rash was from the product or something else, and it did eventually clear on it's own, so who knows. Just thought I would add my expereince and let you make up your mind- HTH!!