My 6 month old cat has a swollen bottom lip and below the lip it is really red. This happens about once a month and lasts for 3-5 days. He is eating, drinking, and playing like normal, but what causes this and should I take him to the vet?
Yes, a vet visit would not hurt. This sounds like a rodent ulcer which is usually caused from an allergy. A vet visit will help confirm this. vetcare