My cat has a lump on his ear. Should I put ice or antibiotic cream?

That looks like it may be a hematoma or a wound that has become infected (very common in outdoor cats). Unfortunately, it needs to be seen by a vet in person so it can be clipped away and the area cleaned/antibiotics given as needed. If you are unable to catch him and bring him in yourself, you may see if your local humane society or animal control can come out to humanely trap him so he can be brought in fore care.

Ouch! That unfortunately should be checked out by a vet in person, especially if it's growing in size and looking more inflamed than usual, as this could indicate something such as an infection or growth that requires treatment. Typically, a vet will be able to take a sample of the area to determine the exact cells present and what treatment is needed. Until you can get to the vet, placing an Elizabethan (cone) collar on Sebastian may help keep him from rubbing or pawing at it to help it heal. Keeping the area clean and dry may also help. If you're having trouble affording veterinary care, these resources may also help so that you can get Sebastian in to see a vet: https://www.humanesociety.org/resources/are-you-having-trouble-affording-your-pet , https://www.dogheirs.com/resources-affordable-veterinary-care/

It could be that Trouble has an abscess from scratching his neck causing the lump. Abscesses are pockets of infection which should be treated with antibiotics, so it is possible that the vet did the right thing if they suspected an abscess. It's good that Trouble is acting normally, and I wouldn't worry just yet. Keep an eye on the lump and if it doesn't go down, then I would have him seen by a vet again.

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. Judging from your description and the fact that she is an outdoor cat, I would suspect what you are seeing is an abscess. I would recommend getting her to a vet if possible to have the lump examined so that the most appropriate diagnostic and treatment recommendations can be made. If you know who the owners are, I would try to discuss this with them before taking their cat to the vet for treatment. 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.

It's likely that this lump is an abscess from a fight he had outside with another cat, you will need to take him to the vet in order to get it checked and treated, if it is an abscess it will need to be lanced and clean under sedation, he will also have an antibiotic injection to treat the infection.

It looks like he had an abscess that burst open. It would be best to have your vet check this out. In the meantime you can use this wound spray on it. ( https://www.petco.com/shop/en/petcostore/product/vetericyn-cat-wound-and-skin-hydrogel )

Hello. Sounds like Petunia sustained a cat bite that got infected. Your veterinarian will prescribe an antibiotic for Petunia to take for a few days to a week & she should be fine. Thanks for using Petco Pet Education Center, formerly Petcoach.