Hello,
Thank you for taking care of this kitty. It sounds like he really needs to have a friend in his corner.
I think that a few things are really important to discuss. One, although the skin wounds are concerning I think that too often pet parents are focused on an exterior (often transient and benign things), and forget about all of the immensely important things going on in the inside. Like, is this cat spayed, neutered or vaccinated? These are the absolute foundations for a healthy pet.
I also think that your vet can help you understand if this is a parasite issue like fleas?
I wish I could tell you that this is and give you the answer to help it get better, but, medicine isn’t just looking at a picture. It is about helping the pet from the inside and out.
I think that you need help from a vet. I think this cat needs to be spayed/neutered and vaccinated. I also think they need an antibiotic and a product to help with fleas.
Good luck.
I suspect that this is related to allergies and therefore the answer lies in helping the body from the inside out versus trying to get topical products work for the outside in.
Please talk to your vet about the many options we have for treating atopy in dogs.
You may also need an oral antibiotic or medication for over abundant yeast.