My cat has a blister-like sore on her lip. Should I be concerned?

Question

My cat has a blister-like irritation on her lower lip. Should I be concerned? Her brother is not showing anything similar. I haven't given it any thought before today, which makes me think either it just appeared within the last day or so, or it has gotten larger. My first thought is that it looks like a fever blister. Pet's info: Cat | Mixed Breed | Female | spayed | 1 year and 1 month old | 9 lbs

Lauren Jones VMD · Accepted Answer

The lesion on Bamboo's lip is quite prominent. It could be due to infected hair follicles, an indolent lip ulcer (although the photo does not quite look typical of this), or a benign or malignant mass. Since this lesion has grown fairly rapidly over just a day or two, she should be examined by a vet sooner rather than later. The vet will likely need to perform a fine needle aspirate, whereby they will draw out a sample of cells with a needle (it's quick and relatively painless!) so that they can be examined microscopically. From there, the vet will be able to determine if Bamboo should be started on a course of antibiotics or if she will need to have this lesion surgically excised. I hope that all goes well!

My cat has a blister-like sore on her lip. Should I be concerned?

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