Why does my dog have a hard, growing lump on her nipple after puppies?

Question

my dog since her last litter has some type of mass on her teat. it has gotten bigger it feels like a bag of worms but is relatively hard. when she walks you can see it hanging down it has gotten big. Pet's info: Dog | Yorkshire Terrier | Female | unspayed | 15 lbs

Megan, DVM, CVA · Accepted Answer

Poor MIssy. This could be mastitis (infection) or mammary duct inflammation. It could also be a type of mammary tumor. Since about 50% of mammary tumors are malignant, I would have your vet take a look at it. Your vet will be able to aspirate it to see whether she needs some oral meds to help her or if she needs further diagnostics or treatment like a biopsy or surgery to have it removed. I hope this helps!

Why does my dog have a hard, growing lump on her nipple after puppies?

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