Is there a mange for felines?

My Grandfathers cat like "chews" his hair out, around the rib area and upper hips & a little down by his tail but he doesn’t mess with his back.
It leaves no redness or sore however.
Is it a type of mange or mites or something?
Is their a special dip or treatment?
PLEASE** answer asap! detailed answers please

Thanksss!

If he’s chewing, or pulling, it’s usually a food allergy or allergy to flea bites. Your vet can help narrow down what’s going on.

Mange may be itchy, but often isn’t. It shows up as patches, but the cat doesn’t chew the fur off.