Why does my dog have a small, sore, bleeding lump behind his ear?

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Bertie. Lumps generally fall into a few broad categories including growths/tumors which can be benign (not cancer) or malignant (cancer), granulomas which are a collection of inflammatory cells, abscess/infection, among others. In young dogs, a common benign tumor called a histiocytoma can develop. These are raised growths, often pink and somewhat flat like a button. These growths oftentimes resolve on their own without treatment. I would advise that your veterinarian take a look at Bertie. They can get a detailed history and do a complete physical exam focusing on the area of the growth, They may advise diagnostics such as a fine needle aspirate or a biopsy of the growth to determine what it is. If they suspect a histiocytoma they may just advise monitoring the area but to also be on the lookout for any scratching of the ear/growth. Once a diagnosis is obtained or suspected, a sound treatment plan can be discussed. The ear is a tricky area for growths and their removal because of the lack of skin to close over the incision if they are removed. Thus, a growth in this area warrants a quick analysis by your vet. Good luck with Bertie.

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.

It could be an infection, cysts, or a mass. Marley should be examined by a vet to determine the exact cause. Your vet can do a fine needle aspirate to determine if it needs to be treated. If it is just a benign lump, your vet may want to just monitor it for changes.

It is difficult to tell from the picture, but it looks like what you are seeing is a mass. We will commonly see benign masses in young dogs called a histiocytoma which can be itchy. Unfortunately, there isn't any way to determine what a mass it just by looking at it. Your vet can do a simple test called a fine needle aspirate to remove some cells with a needle and look at them under a microscope to determine what the mass is. If it is a histiocytoma, it will go away on its own, but Damon may need some medication to keep it from being itchy. I have attached more information on histiocytomas below. https://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=1676 Good luck! I hope that was helpful. Thanks for using PetCoach.

Thanks for using Petco Pet Education Center, formerly Petcoach! If it truly was not there yesterday, this is most likely to be a bug bite (tick, mosquito, spider, bee, other), dog/cat bite (if he was wrestling with any other friends lately), or some other random trauma (crashing through a spiky bush or catching it on something). If you're unsure how long it's been there, add cyst, benign or malignant tumor, and others to the list of possibilities. I'd slap some neosporin on there twice daily and watch it. If no improvement in 3 days (or if worsening at any time), it's time to see the vet. This goes for any accompanying facial swelling, vomiting, or diarrhea, as these could be signs of serious allergic reaction. Best of luck to you and Lucky!

Please know that without seeing Snoopy in person, there is no way for me to say for certain what is causing his lump. It could be a cyst, an abscess, a benign tumor, or a malignant tumor. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options with you. I would take him into the vet on Monday to have this lump examined and diagnosed so it can be treated as needed. Good luck, I hope this helps!

I suspect this is a histiocytoma, in which case, it should resolve on it's own within a few months. Don't put anything on it, just leave it alone. If it does not go away in a couple months then have your vet check it. ( https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4952066 )