Why does my cat have a blood-filled lump hanging from his ear?

This lump needs to be checked and analysed as there are many conditions and types of tumors that could look like that. take Blacky to the vet, they will perform a fine needle aspiration on the growth and send it to the lab for analysis. when the result comes, the vet will advise what needs to be done according to the diagnosis.

This lump needs to be checked and analysed as there are many conditions and types of tumors that could look like that. take Snowball to the vet, they will perform a fine needle aspiration on the growth and send it to the lab for analysis. when the result comes, the vet will advise what needs to be done according to the diagnosis.

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 )

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.

By it's look only it's not possible to tell what type of tumor it is. this lump needs to be checked and analysed as there are many conditions and types of tumors that could look like that. take Sunny to the vet, they will perform a fine needle aspiration on the growth and send it to the lab for analysis. when the result comes, the vet will advise what needs to be done according to the diagnosis.

I would recommend having Lily evaluated by the vet if this mass is getting bigger. any abnormal growth that is changing in size and shape should be assessed to make sure that it is not malignant. A needle aspirate may give your vet enough clues to determine what this is, or they may recommend surgical biopsy or removal. Thank you for using Petco Pet Education Center, formerly Petcoach.

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/