We have an 8 year old cat that in the last year has started scratching the top of his head and chin on and off. He gets to the point that touching the top of his head to pet him causes him to shake his head or lean to the left and try to bring his back paw in to scratch. His chin is also the same, if you pet him there he scratches with the back leg. We see big tufts of hair everywhere since he also seems to scratch his neck.
We took him to the vet twice about this issue. She suggested at first that it might be the bowls but we have tried ceramic and stainless steel for weeks before going to the vet the first time at the start of 2020. The cat always had ceramic bowls but about 2 years ago we introduced an auto feeder since we all traveled a lot that had a plastic bowl. We have thrown the auto-feeder out more than a year ago so that's not the issue.
We used to feed him dry food (Royal Canin for sterilized cats) for the last 5-6 years and he never had issues. The vet suggested to try a hypoallergenic dry food, so we tried the one by Royal Canin and the one by VetLife. We first tried VetLife and he didn't seem to respond to it. We tried it for around a month and then switched to Royal Canin. That was 2 month ago. The cat didn't scratch all that much over the last 2 month but this last week he's been scratching furiously.
The vet also suggested to give our cat a drop of Cortisone to ease his scratching but I somehow feel that although this might alleviate the symptoms, we're not really dealing with the cause.
We have considered the bowls, the food, the vet excluded cat acne and parasites. He's an indoor cat and the house gets cleaned constantly and the Roomba goes out once per day. Perhaps it's a seasonal allergy but we're not sure.
Our current vet didn't seem interested in looking further. We're planning a trip to a different vet in the next few days to see if they have any ideas.
What else could be causing this itchiness? Our cat seems exhausted from all the scratching. We can barely touch him or he starts scratching and he's a very affectionate cat and loves pets.