Why does my dog have a hard lump from a tick bite that won't go away?

Question

My dog gets a lump that won't go away after being bit by a tick. He has a lump on the top of his head from a tick bite that has been there for over a year. What could be the reason for this? Pet's info: Dog | Boston Terrier | Male | unneutered | 5 years and 8 months old | 25 lbs

Andrea M. Brodie, DVM · Accepted Answer

Sometimes thed skin reacts to the tick bite with an overproduction of connective tissue fibers. This usually feels like a hard little knot. It is more a beauty issue than a medical issue. This is not something you have to worry about as long as it does not grow in size or changes color or shape. It will likely get smaller over the years or maybe stay the same.

Why does my dog have a hard lump from a tick bite that won't go away?

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