Lump on skinny pigs back

Question
I noticed this morning that my skinny pig has a good sized lump on her back just above her bum.  She is just turned 5 a couple weeks ago.  This is probably a dumb question but should I be concerned.  She is still eating and drinking, she seems fine.

Answer
hmmmm..
a lump is always a little bit of a worry. I would personally take her to a vet just to get it looked at to be on the safe side. You also mention that she's skinny and that worries me too. I think a vet trip is in order to see what's going on.