Mohs forehead scar not healing after 6 months? (Photo)

I had Mohs surgery on forehead 6 months ago, and there is a 3/4" diameter scar that does not seem to heal. The skin on this area is red, raw, and paper thin - it looks like the top layers of skin have never healed correctly. Is this occurrence abnormal for 6 months post -op, and is this type of forehead scar suitable for reconstructive surgery? And, are there other types of non-surgical procedures - derma filler, laser surgery - that could help?