Irritation and soreness of the skin occurs around flea bites.
Red, raw areas and scabs caused by the cat scratching himself obsessively; these may be found all over the cat’s body, or just in localized areas such as near the base of the tail and behind the ears. Some cats are more sensitive than others to flea bites and can be driven almost to distraction with the resultant itching.
A reaction to the saliva of the fleas when they bite the cat in order to feed on his blood.
The cat may require a course of treatment to alleviate irritation, along with treatment to kill the fleas and prevent reinfestation.
What to do
Some of the fungi responsible for ringworm are zoonotic contractable by humans, so take care that you and your family are not infected. Only your vet can prescribe effective treatment, so seek urgent advice.