Hello,
anytime I see a cat with itching at the base of the tail I do two things;
1. put a good, safe flea and tick medication on, I like Revolutions, but Frontline is also good.
2. I check the anal glands
the other thing I do is look for any signs of trauma around the area.
In some cases cats have a hyperesthesia complex. This is something to talk to your vet about
see more about this here; https://www.webmd.com/pets/cats/what-is-hyperesthesia-in-cats
I hope this helps
Hello,
I think that if your cat isn’t responding as expected that it’s time to go back to the vet. I also think that you should talk about al of the other possible causes to his current clinical signs. A polyp is on the list of possible causes.
Good luck.
What other possibilities could you think why he is not eating and drinking?