My cat has a rash all over his neck, it’s very bumpy and itches him a whole lot. He does not wear a collar or a flea collar. I read somewhere that it could be a plastic or metal allergy caused by his food bowls, I switched the food bowls to ceramic, and the rash seemed to go away for about a week, but now it is back. I cannot afford to take him to the vet right now. Is there anything I could do to relieve the itchy and/or make the rash go away? Also, does anyone know what may be causing it? Thank you! =)