My Dog Has a Soft Lump After Vaccine Shot: Normal or Serious?

My 7month old puppy has a massive lump on his back it is a week after his vaccination for his skin disease. The disease is almost gone but then there's a soft lump like liquid on his back. The one who did the injection was the assistant and not the c

The lump is likely to be caused by a tissue reaction due to the injection. If that is the case the lump will resolve, and will not have any consequence. If it persists more than two weeks or if it gets bigger a check up would be needed (as it could be infected). Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. If this answer was helpful please let us know, this will be used to improve our service!

Updated on September 24th, 2025

Health & Wellbeing

Puppy has lump size of dime on shoulder. It’s very moveable slightly hard but I can press. My puppy doesn’t feel bothered by it at all. What could this be? Should I be worried? Do vaccines cause lumps like this? She recently got her rabies and flu sh

Hello, sorry to hear about your pup. Yes indeed, vaccines can cause local reactions and lead to lump formations that can be painful to non-painful, firm to soft, and of varying sizes. Most of the time, the masses are self limiting and will resolve. Occasionally, the masses will remain and need to be removed, in even more rare instances vaccines can lead to tumors. I would recommend contacting your veterinarian to inform them of this bump and have them evaluated to ensure it is not getting worse. Hope this helps and best of luck.

Updated on September 24th, 2025

Health & Wellbeing

Last night, I noticed a hard, oval-shaped lump under Bruce's skin right by one of his shoulder blades. It doesn't seem to bother him at all, and he seems healthy aside from that. I noticed it's in the same place he got his vaccines last week and a fe

Hi there! I'm sorry to hear about Bruce's lump. Vaccinations can definitely leave behind a small bump at times. If this happens after I vaccinate a dog, I will have the client bring their pet in so I can examine the spot, make sure that it coincides with where I gave the vaccine for sure. If it is something new rather than a lump from the vaccine, it can be addressed accordingly. As long as it is just from the vaccine, then we monitor the spot over the course of a few weeks. If it is a localized inflammatory response to the vaccine, it usually will go away over time. If it persists, some clients will opt to have me remove the tiny lump and test it to make sure it just comes back as an inflammatory response and not something serious. I would definitely call your veterinarian and have Bruce get a quick examination to make sure all is well, and you will likely just monitor the lump going forward. I hope you find this answer helpful. Best of luck!

Updated on September 24th, 2025

Health & Wellbeing

My puppy has a movable, painless, small lump (about the size of a marble) at the site of vaccination. Will it be fine on its own?

Hi, thanks for using Boop by Petco! Yes, Luna should be fine. It isn't uncommon for a pyogranulomatous reaction to occur at the site of vaccination. This forms a painless lump in the subcutaneous tissue. It should resolve on it's own in a few months. I most commonly see if with the Rabies vaccine. Have a great day!

Updated on September 24th, 2025

Health & Wellbeing

Hello my name Larry I have a 6 week old puppy I just gave him his first pup shot on 3/24/18 the lump from the shot haven't went down he is active eating and stool is good

It can take up to 3 months go away. If it continues to grow or last past 3 months then I would have it checked. You can apply a cold compress to the area to help with the reaction. When. Her next vaccine is due I would also have a vet do it and give it in a different spot to report the problem to the company if it happens again

Updated on September 24th, 2025

Health & Wellbeing

Hi! I injected my puppies a vaccine against Parvovirus(5 in 1 vaccine), a week ago. Lately, i noticed it that they have a lump around the site that i injected. Is it normal? Thanks

A lump may develop at the site of injection. It typically resolves on its own. See your veterinarian if the lump grows, becomes painful or if the pup develops a fever, becomes lethargic, begins vomiting or has diarrhea or loss of appetite.

Updated on September 24th, 2025

Health & Wellbeing

Sonic received vaccines this past Monday. As of yesterday (3 days after his vx’s) he’s been super sensitive when I pick him up or touch his back and seems like he’s in pain when I do so. He does also have a lump on his back where the vaccines were ad

Sometimes after vaccinations dogs can be sore from them. They can also get a localized reaction which can feel like a lump where the vaccination was given. I would call your veterinarian and explain your concern. They can prescribe an anti-inflammatory for him and can evaluate the lump to see if it is a localized reaction. This is not an emergency unless he is in a severe amount of pain so you can wait until your regular veterinarian opens tomorrow. Thank you for using Boop by Petco.

Updated on September 24th, 2025

Health & Wellbeing

Pocholo was given a vaccine last December 26,2016. Just today, I noticed a small soft lump on his skin at the back where the injection was administered. It's like a cyst with water inside because it's very soft. Is Pocholo be okay and if I will apply

A hot compress is a great idea. I would do this twice daily. Massaging the area is also very helpful. It is likely an immune response to the adjuvant in the vaccine. This is not the pathogen that the vaccine is designed to protect against but rather the solution that holds the vaccine. Please monitor closely.

Updated on September 24th, 2025

Health & Wellbeing

This morning I noticed a lump under my puppies skin just under his eye about 3 inches. Just above his gums. Theres nothing in his mouth so it is under the skin, it feels soft, I can move it around a tiny bit. He doesn't whine when I touch it and he i

There is a lymph node in that location on the face, so that might be what you are feeling. It is possible that the vaccine stimulated that lymph node or there is something else going on that it has enlarged. If it is not resolving in a couple of days or it if is getting larger and harder, I would recommend having your veterinarian examine it. Good luck! I hope that was helpful. Thanks for using Boop by Petco.

Updated on September 24th, 2025

Health & Wellbeing

My puppy recieved her Distemper-adenovirus type2-parainfluenza-parvovirus vaccine 2 days back. I notice a swelling(under the skin) at the site of vaccination (which is near her last ribs). Is it common or should I see a vet?

That could be a local reaction at the injection site which is not uncommon and could resolve without treatment in the next 48hours. If not self-resolving or getting any worse in terms of swelling/painful/red a check up would otherwise needed. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

Updated on September 24th, 2025

My dog has a soft lump after a vaccine shot. Is it normal or serious?

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My dog has a soft lump after a vaccine shot. Is it normal or serious?

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My 7month old puppy has a massive lump on his back it is a week after his vaccination for his skin disease. The disease is almost gone but then there's a soft lump like liquid on his back. The one who did the injection was the assistant and not the c

Puppy has lump size of dime on shoulder. It’s very moveable slightly hard but I can press. My puppy doesn’t feel bothered by it at all. What could this be? Should I be worried? Do vaccines cause lumps like this? She recently got her rabies and flu sh

Last night, I noticed a hard, oval-shaped lump under Bruce's skin right by one of his shoulder blades. It doesn't seem to bother him at all, and he seems healthy aside from that. I noticed it's in the same place he got his vaccines last week and a fe

My puppy has a movable, painless, small lump (about the size of a marble) at the site of vaccination. Will it be fine on its own?

Hello my name Larry I have a 6 week old puppy I just gave him his first pup shot on 3/24/18 the lump from the shot haven't went down he is active eating and stool is good

Hi! I injected my puppies a vaccine against Parvovirus(5 in 1 vaccine), a week ago. Lately, i noticed it that they have a lump around the site that i injected. Is it normal? Thanks

Sonic received vaccines this past Monday. As of yesterday (3 days after his vx’s) he’s been super sensitive when I pick him up or touch his back and seems like he’s in pain when I do so. He does also have a lump on his back where the vaccines were ad

Pocholo was given a vaccine last December 26,2016. Just today, I noticed a small soft lump on his skin at the back where the injection was administered. It's like a cyst with water inside because it's very soft. Is Pocholo be okay and if I will apply

This morning I noticed a lump under my puppies skin just under his eye about 3 inches. Just above his gums. Theres nothing in his mouth so it is under the skin, it feels soft, I can move it around a tiny bit. He doesn't whine when I touch it and he i

My puppy recieved her Distemper-adenovirus type2-parainfluenza-parvovirus vaccine 2 days back. I notice a swelling(under the skin) at the site of vaccination (which is near her last ribs). Is it common or should I see a vet?

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