Flea bites can cause itchiness on a cats skin. One of the signs of fleas on cats is sudden scratching of their body with their paws or chewing their skin in an attempt to stop the itchy sensation. To give them some temporary relief, use cat flea and tick shampoo, such as Advantage.
When your cat has fleas, the bite usually causes your pet to scratch and it can lead to irritation and allergies. If fleas become established on your cat, it can lead to more serious health problems and you could end up with an infestation in your house.

This mean that a cat suffering from fleabite dermatitis will have an acute and localised skin reaction in the area of every bite they receive, and in some cases, just one bite can have an irritating systemic affect on your cat too.

Bartonella henselae infection caused by cat flea bite. In: Pathology International. 2016 ; Vol. 66, No. 3. pp. 177-179.

Moving forward, it's essential to keep these visual contexts in mind when discussing Cat Fleabite Skin Infection Causes.
When a flea bites a human, it can transmit bacteria and parasites that may cause infections or allergic reactions. Common symptoms of cat flea bites on humans include redness, swelling, itching, and sometimes hives or allergic reactions.
Flea allergy dermatitis (FAD) is a leading cause of allergic reactions in dogs, and while normal cats experience only minor skin irritation in response to fleabites, cats with flea allergies have severe reactions to even a single fleabite.