My cats nipple is swollen, what could it be?

Question

One of my cats nipples is swollen and its yellowish white. It looks like a mini water balloon. She is not spayed and has never had kittens and she hasn't been near any male cats so shes not pregnant. She keeps going like nothings wrong, so i don't think its bothering her. But lately she has become closer to me, its probably because shes getting a little old (barley 5) but my paranoia says that maybe shes getting closer cause somethings wrong with her. Please let me know if you know what it could be. Thanks.

Answer 1

She probably has an infection or possibly a cyst.  I would take her to the doctor and have it checked out before things get worse for her.  

Answer 2

you need to get some bag balm...you can get it from the store... found in most  pets departments...dont put to much on though...

Answer 3

Take them to the vet,It's sounds like an infection. And a cat isn't getting old when they are 5yrs, 12yrs maybe. I have had cat's who have lived for 21 years.