Caused by skin mites, they are characterized by small crusts and hairless areas accompanied by lesions that the cat gets scratching for the severe itching.
Here too the itching is so prevalent that the cat scratches and licks itself so hard that it injures itself, the causes can be different:
The primary responsible for this type of pathology is the microsporum canis, which can be transmitted directly from infected specimens or, indirectly, from cages or common environments.
fungal dermatitis or dermatomycosis
There are rounded areas without hair, with a red halo. There are no real preventions, the only recommendation is to take the cat to the vet as soon as round holes appear on the coat. The cat must also be sanitized well.