My dog has a hard lump on his hind end. Should I take him to the vet?

Question

My dog has a strange mass on his hindend. It wasn't there before and I'm not sure if he got bit by something or if I should be concerned. It seems to be a hard mass. I marked it to keep track of it, but I'm unsure if I need to take him to the vet as my roommate noticed it earlier this morning, though I didn't notice it til evening. Pet's info: Dog | Mixed Breed | Male | neutered | 40 lbs

Andrea M. Brodie, DVM · Accepted Answer

It would help to know whether this mass is next to the anus or on the thigh. If it is next to the anus, it could be an impacted or infected anal sac, Your veterinarian can easily empty that, and in case of an infection, flush it and infuse it with an antibiotic. If the mass is in muscle, for example your dog's thigh, then this should also be seen by your vet who will try to determine whether it is a cyst or abscess or a tumor. Your vet would likely do an FNA, a fine needle aspirate, where he will harvest material from the mass. This material is then examined and will help determine whether the mass is malignant or benign. I would suggest you observe it and if it is not gone by Wednesday, you take your dog to a veterinarian for an exam. Please let me know if you have any other questions or concerns and I would be more than happy to help you further. Please take the time to mark this question as helpful or not as it helps us to improve on the quality of our answers to other pet owners. Thank you kindly!

My dog has a hard lump on his hind end. Should I take him to the vet?

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