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My dog suddenly has a hard, round bump on his front leg. What is it?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 7 months and 16 days old | 2 lbs

Candle has a hard to the touch round bump on his left arm (front leg) that he didn’t have yesterday and I’m not sure what it could be I know that my pictures aren’t really up close but I can try for better ones

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1 Answer

Most Helpful Answer

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on June 9th, 2018

This could be an allergic reaction, like an insect bite/sting or may be a spot of infection, or a skin tumor. I would recommend keeping a close eye on it for now. If the swelling worsens or the area becomes larger, then I would recommend taking him in to have the lump checked. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach. Best of luck.

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