After applying cat-ringworm medication for a few days, it started peeling. What exactly is this?

Hello, based on the photo you uploaded, the cat’s symptoms do not look like ringworm but more like a bacterial infection. If the wrong medication is used, not only will it be ineffective, it may also cause greater harm to the cat’s skin, such as secondary folliculitis.

It is recommended to stop medicating the cat and take it to a veterinary clinic promptly to find the cause and provide appropriate treatment. During treatment, keep an Elizabethan collar on the cat to prevent it from licking the affected area.