You don't mention a spur or bleeding your thread. If he knocked off his spur and is bleeding, then you will need to catch him (try when he's roosting at night) then treat it.
As for what's on his comb, hopefully you can take some clearer photos while tending to his spur.
Here's your other thread.
https://www.backyardchickens.com/threads/what-is-this-on-my-rooster.1515470/#post-25499481
The rooster which is the subject of this
initial thread, I would assume the OP
@Livvvmndza has taken care of the issue. It's been
10days since the first post and we haven't received an update. Maybe they can come back and let us know how he's doing.