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Why is my dog lethargic, vomiting blood, and has a nipple lump?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed | Female | unspayed | 4 years and 6 months old | 9 lbs

My dog has a lump on her nipple this happened before but went away but now I'm worried since 3 days ago she poop blood with mucus and she vomited last night brown liquid now she's laying around all day she a shitzhu teacup 5 years old

4 Answers

Most Helpful Answer

Answered By Rebecca, DVM

Veterinarian

Published on June 19th, 2017

I would recommend that Linda see a vet. The lump may or may not be related to her other signs but vomitting and diarrhea with lethargy can become serious quickly in small breed dogs. Blood in her stool and brown vomitus indicates bleeding in her GI tract so she may be at risk of anemia as well as dehydration. She should be seen asap if she is still vomitting or lethargic and depressed. And mammary cancer is more likely to occur in unspayed females so the lump should be checked out as well.
I hope Linda is feeling better soon.

1Pet Parents found this answer helpful

Related Answers from Veterinarians

Answered By Destini R. Holloway, DVM
Veterinarian
Published on January 28th, 2017
Your pet sounds very ill. A lump on her neck could be a swollen lymph node. She could have a bacterial or fungal infection, immune mediated condition, or even neoplasia (lymphoma) has to be considered. I would highly suggest taking her in to see your local vet for an exam and diagnostic testing to determine the underlying cause. Once we know what is going on with her internally, then we will know how best to treat her condition. At the very least the vet can examine her, see if she is stable, and get her on anti-vomit medication and potentially antibiotics if an infection is suspected.
1Pet Parents found this answer helpful
Answered By Dr. Elizabeth
Veterinarian
Published on December 23rd, 2017
That lump is strange. My first thought is maybe Pandora got hit by something and its like a 'goose egg' on a human. It could also be a reaction to some sort of insect sting or bite. Try giving her an antihistamine for the next 24 hours and pay very close attention to the lump. If it does not go down or she starts acting sick, take her in to see the vet. Obviously, you could also just take her in today to get it checked out. It could also be an abscess but that typically takes a few days to form. I hope this helps to give you an idea of what it could be. Please post again with any further questions!
1Pet Parents found this answer helpful
Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS
Veterinarian
Published on August 22nd, 2017
Although a picture of it would help to determine more specifically the underlying cause of it, differential causes would include lymph nodes enlargement, abscesses, tumoral masses or accumulation of fluid due to venous return impairment.
A check up is essential to confirm of these causes and give you appropriate treatment options.
1Pet Parents found this answer helpful

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