Why is my senior dog's lip so swollen and what should I do?
Updated on September 23rd, 2025
Pet's info: Dog | Mixed Breed Small (up to 22lb) | Female | spayed | 12 years and 2 months old | 12 lbs
My 12 year old little Claire has an awful looking swollen looking lip. About 2 years ago her black lips and nose started to turn pinkish with no symptoms at all. About 4 months ago she got a sore under her chin and I took her to the vet. She was given antibiotic and steroids for what they thought was an autoimmune disease. Since she has developed this very swollen looking lip. I was told her teeth and gums look good (for her age) and they offered to do some blood work but no definitive answers!
That is sure an impressively swollen lip! Poor Claire! This type of swelling could be a few things. Even though your vet thought the teeth look okay, we can't tell what is going on under the gumline, and an abscess from an infected tooth could be a possibility. Autoimmune disease is also a possibility. She could have a ruptured salivary gland. Or it could be something as simple as an insect bite. It is hard to get a full idea of the extent of the swelling from just the pictures alone. A fine needle aspirate, or using a needle to collect some cells from the swollen tissue, could give a better idea of the cause. I hope it is something that goes away quickly. Thanks for using Petco Pet Education Center, formerly Petcoach.