My cat has a bump on her mouth that popped with pus. What now?

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. Based on the pictures you provided, I would recommend just monitoring this for the time being. It could be an area swollen from her hitting her chin on something or it could be an infection / pimple (acne). If it does not resolve on its own, I would recommend having Mouse examined by a veterinarian so that the most appropriate diagnostic and treatment recommendations can be made. I hope this helps! Please let me know if you have any other questions or concerns and I would be more than happy to help you further. Please take the time to mark this question as helpful or not as it helps us to improve on the quality of our answers to other pet owners. Thank you kindly!

Thanks for using Petco Pet Education Center, formerly Petcoach! These could be benign or malignant growths. There is no way of knowing for sure without an examination though this represents a reason to seek veterinary care. This is usually determined with an examination and a fine needle aspirate (FNA) or a biopsy. Treatment depends on the findings up to that point. I recommend you have Moo evaluated by a veterinarian for further assessment and treatment. Good luck and have a good night!

Hello. I would just watch this for now. I have removed several of these off of older cats, & they are most often benign & not dangerous. Removal is always curative. If it looks like it is enlarging, or it is interfering with his ability to eat or chew, definitely consider having it removed. Otherwise, just monitor for now. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

I suspect this might be what is called a "resorptive lesion." There is a tiny tooth right there, and for some cats, they develop lesions where the body actually breaks down their teeth over time. They can be painful. For some cats, they don't show any signs. Have him evaluated by your vet; they may recommend a sedated dental exam and dental xrays to evaluate the tooth roots. If roots are left under the surface, its potentially a source of infection and pain, and surgical removal of the root may be considered. Other possible causes of the bump would be inflammation, infection, (unlikely based on appearance), or an abnormal grownth/tumor. Get him in to your vet when you can to have it checked out. Thanks for asking Petco Pet Education Center, formerly Petcoach!

Hello. This is a mild allergic reaction to something. It may take a few days to a week to go down, but if it does not, or seems to be getting larger, please see your veterinarian. Thanks for contacting Petco Pet Education Center, formerly Petcoach.

Thanks for using Petco Pet Education Center, formerly Petcoach! If this disappeared then a cancer would very unlikely and a cyst or infection more likely so I would be more hopeful that that is the case. Continue to monitor Cheese and have him examined if this becomes evident again. Good luck and have a great day!

This sounds like your cat had a cat bite abscess, If you can make sure all the green goop (pus) is evacuated. If you have a mild wound disinfectant at home you can flush the cavity. Make sure all the liquid is out. It should heal by itself, if not your kitty needs to be seen by a vet and will likely need prescription antibiotics.