maybe because it's winter time, and skin is a bit dry. Just like for some people, they feel very 痕 for their body in winter. Keep moisturize.
Also, when the scar is repairing, some people will feel 痕. I remember when I was a child, and felt down, got hurt. The scar (knee) is very 痕 during the repairing stage.
I can suggest you to apply St. John Wort's Oil around the scar area. It is a very famous oil to stimulate cell regeneration, repairing scar and burns too. The oil will at the same time hydrate the skin, and makes it less 痕.