My 4-month kitten has a pus-filled lip bump. Is it from nursing mom?

This could be the beginning of a condition also known as "rodent ulcer", it's basically an autoimmune reaction and it is not surprising if it starts to occur around pregnancy time. at the moment as long as it doesn't bother her and it doesn't become much larger, i would recommend just monitoring it, as treatment for this condition usually involve steroids which you can't give to a lactating mother.

A lump in such a young cat could be an infection, a small wound, an insect bite, a lymph node, or waaay less likely, a mass. If she's going to a full-service veterinarian tonight they can definitely give you a good idea of what's going on. If you're going to a vaccine clinic, they'll be more limited in what they can do but can still give you a good idea if it's something normal or concerning. Between now and then, just leave the bump alone so that doesn't get bigger from being messed with. Don't try to clean it or pop it or remove it in anyway. Good luck to you and Kitty!

Thank for using Petco Pet Education Center, formerly Petcoach! It does sound like a small pustule with pus. If it was small and it is now drained and there is no inflammation present then it is probably fine to just keep an eye on her. If a discharge develops or it becomes warm to the touch or painful, have her evaluated by your veterinarian for further assessment and treatment as antibiotics are likely going to be needed. Good luck and have a good night!

Poor little guy, he’s adorable! This looks like a deep skin scrape or abscess that is starting to heal. I would clean it with hydrogen peroxide and then apply a thin film of antibacterial ointment on it. This should heal in a week or two. If it isn’t healing or Romeo stops eating then I would bring him in for an exam. He could develop an infection that may need antibiotics to resolve. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Romeo.

Marshy likely either has an infection or an autoimmune condition called a 'rodent ulcer.' Cancer could look like this but is less likely. I would recommend to take her in for an exam. The doctor will prescribe medication based on the exam and history. I hope this helps with your baby!

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!

In that area, cats can have some odd looking structures in their mouths. Check the other side for a matching structure. if one is present, it's likely normal. If one is not present, have him examined by the veterinarian to see what that is. I hope this helps.