If she’s not itchy, there’s not much you need to do. Kitty needs to be on prevention tho. My cat gets Revolution Plus monthly, even though she doesn’t go outside. Fleas could also pass illnesses to your cat. And wash all bedding and whatever you can, and then spray the rest of your house with flea treatment
Not sure what helps but highly suggest getting kitty on frontline and wash all bedding. I’d say a normal bug bite cream should hopefully help :)