Why is my dog acting strange and has a painful lump near his bum?

Question

He suddenly got a big lump by his bum ,I noticed he was acting different today but I didn’t know what till hours later I saw it and I think it bothers him to an extinct I just want to figure out what it could be cause he’s not acting like him self . Pet's info: Dog | Mixed Breed | Male | 50 lbs

Andrea M. Brodie, DVM · Accepted Answer

Ouch, that looks painful. This could be an abscessed anal sac, a cyst or a tumor. I suggest you take Norman to a veterinarian ASAP for an exam. An abscess can usually be treated with antibiotics and/or be lanced, and a cyst can be evacuated. Your vet may want to do a fine needle aspirate (he takes some material from the bump with a needle and then looks at it under the microscope) to determine whether the mass is concerning.

Why is my dog acting strange and has a painful lump near his bum?

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