My cat is four years old, and something weird happened today that, even though I have an appointment for him at seven tonight, still has my stomach in knots. He hasn't been pooping much lately, I think due to the change of food, but he acted completely normal. Earlier his butt was very swollen and Rex and when I went to touch near his tail he meowed in pain. He couldn't lay down properly, he had his butt in the air. So I, in a panic, ran outside to make a call to the vet. By the time I came back in (ten minutes tops) the swelling was gone and he seemed 100% normal. He's still getting to a vet today because he stoll needs to be seen. I can see it's tender and it's kind of "oozing" but nothing horrible. I'm just hoping it's not serious. If you have anything to say about this I'd love to hear your input. Thank you.