Well I think there really is no cure for that but home remedies might help.
You can use a lotion made out of blueberry leaves, this is proven to be fantastic relieving inflammation of Eczema.
Or try this one: Skin wash.
Mix the following ingredients:
1 tsp. comfrey root.
1 tsp. white oak bark.
1 tsp. slippery elm bark.
2 cups of water.
Boil for 35 minutes use it to wash the affected area.
Also, try to avoid Corky to something irritant coz it's one way of making it worse.
Last thing, if Corky's condition is getting serious, better call his vet.
Hope this help.