fish34 answered Sunday December 17 2006, 5:55 am: It depends what you mean by a "bump". If its more of a ball kind of shape, it could be a small tumor, it's not uncommon for dogs (or horses as I have commonly seen) to get very small tumors that never grow very large and are harmless, but I strongly advise you to see a vet to make sure it isn't harmful. =] [ fish34's advice column | Ask fish34 A Question ]
emilyy answered Monday December 4 2006, 3:00 am: It could be anything, serious or not. It could be a bug bite or something worse such as a cancer. You should really take your dog to the vet, because they will be able to indentify it.
You could also try giving it a few days (about 3-5) and see if the bump gets smaller. If not it may be something serious.
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