My dog has a clear neck lump that squirts pus and grows back. Is it serious?

Thanks for using Petco Pet Education Center, formerly Petcoach! It is very hard to say without seeing Safire. It sounds like it could be a cyst (a large pimple). It is common for them to fill and burst. I recommend showing it to your vet at your next visit. They will stick a needle in it and look at the cells under the microscope to determine. Good luck and kisses to Safire!

Hi there and thank you for using Petco Pet Education Center, formerly Petcoach! This appears to be a fluid filled cyst from the looks of it. These can come and go at times. Typically there is no concern with these other than the fact that they are unsightly for some pet owners. This is something that could be removed under sedation if you would like it removed.

Hello, thank you for using PetCoach. Chances are that this is a sebaceous cyst. Sebaceous cysts are usually harmless, sack-like growths with a lining that is not cancerous. In dogs, most cysts develop from hair follicles. These cysts typically appear as single, clearly defined, firm or soft lumps located in the skin or just beneath it. They are often between 0.5 to 5 centimetres in size and may sometimes have a bluish colour. A cyst can release a thick, gray-to-yellow-brown cheesy substance if it bursts. Other terms for sebaceous cysts in dogs include infundibular or follicular cysts. The lump needs to have a fine needle aspirate (FNA)/cytology to be sure of that diagnosis. Here is a link about the procedure and why it is done. It does not require anesthesia. ( https://vcahospitals.com/know-your-pet/cytology-fine-needle-aspiration-fna ) If it is a sebaceous cyst, it will be very obvious once the vet introduces the needle into the lump. Hope this helps. Best wishes.

Hello. This looks like a possible infected hair follicle of sebaceous gland infection. It is probably not dangerous, especially since your dog is still quite young. I would gently clean the area with something like Hibiclens ( available at all pharmacies ) & if it seems to be getting worse, bothering your dog, or begins to ooze, please see your vet as soon as possible. Thanks for using Petco Pet Education Center, formerly Petcoach.

This appears to be a possible pustule (infected small pocket underneath the skin). If just one of these is present and it isn't causing any discomfort, then I would suggest monitoring the area to see if it resolves on its own. You can gently clean the area with a mild soap (ie Dove) and warm water and placing a very thin layer of Neosporin to the bump to see if it goes away. However if it starts to spread or does not resolve within a week or two then a vet visit is needed to get Louie on a short course of antibiotics to get this to heal well. Best wishes and take care and I hope this resolved soon.

If this lump fills up with clear fluid, it is most likely a cyst. These are usually nothing to be concerned by, but they will keep filling up over and over. The only way to get rid of them permanently is to have them surgically removed. Most of the time this isn't necessary as cysts are mostly cosmetic.

It may be infected and he might need an antibiotic. The best thing would be to have your vet look at it again and prescribe an antibiotic. It could also just be removed so it doesn't swell and bother him again.