Let us know how he i doing in a few days. It helps others who may deal with this to see pictures and learn. Hopefully, it won't be too bad of a case. I have seen a bit of rounding off of points on large combs on a couple of roosters, but they recovered well.
How cold is it where you live now? My guess is that it is frostbite, especially if the temps are a bit below freezing at night. I normally don't see it unless the temps are below 10 degrees F. Sometimes you will see swelling as well at first. Favus is usually white and can affect the whole comb...