Poor little guy. That's the burden he will bear for having such a lovely poof on his head, and it won't get much easier for him because the Polish poof is an irresistible target for most chickens.
First aid is easy compared to preventing further attacks. A quick mop-up with a Q-tip and peroxide or Betadine will clean the wound, and an antibiotic ointment will protect it while it heals. Blue-kote is also a good small wound dressing and it will disguise the redness of the wound to discourage further pecking.
But you need to try to stop him from being a victim. It's not going to be easy to convince the other chickens to quit picking at his head, especially an aggressive breed as reds are. The best thing would be to let him have some more Polish and segregate them as their own flock. It's an uphill battle trying to keep Polish from being pecked on their poofy heads.