Scalp Injury

I hear this happens to polish chickens a lot, especially roosters for some reason. I think they just let the hens abuse them.

In any case, keep him separated until the skin heals. A little cat carrier with straw in it works wonders.

Clean it with water and gentle soap or iodine solution
apply neosporin (antibacterial cream) WITHOUT pain reliever
spray with bluekote or wrap with vetwrap
apply new antibiotic cream every day until healed

You might want to examine your chickens living conditions to make sure they aren't overcrowded, and maybe give them 'toys' like a treat ball or a head of lettuce on a string or a suet block on the inside of the coop. I personally have a slightly overcrowded coop right now, due to chicken math, and have had no issues because I use a chicken nipple watering system (that sounds difficult, but it's just 3 nipples and a 5 gallon bucket!). Really cuts down on the pecking each other since the nipples are red and seems to satisfy the desire to peck.

 

Is that the skin on his scalp or his scull? I had a hen once that stuck her head through some chicken wire and got her head caught. By the time I came home the other chickens had pecked the top of her head off. Skin- feathers gone. I didn't realize that it was bone I was looking at until I tried to clean the wound and saw the hole in the top of her scalp. What I did was pull together the feathers on the top and bottom edges of her wound and tied them together with a loop of string. It looked like she had had a face lift but it closed the hole on the top of her head and the edges of the wound closed nicely. She did always have a sort of look of surprise after that, though.