My Pet Rat Wilber

Question
Dear Molly,
I have had my dumbo rat, Wilber, for almost two years now. He has been a wonderful pet and has showed no health problems until now. I just had him running around on my bed and my brother noticed a large bumb on his chin. It looked a little swelled up, almost like a bubble,and red,  but we have no clue what it might me. He doesn't show any signs of discomfert but I'm worried it made be a tumor or something I should be worried about. I dont know if I should tkae it to the vet until I can find out what it may be. Please contact me as to what the problem is. Thank you.

Answer
Hmm, Well it is hard to diagnose what Wilbur may have since I cannot see it. I think it may be a an abcess. Its like a giant pimple. DONOT squeeze it, you should take him to the vet to do that.
I donot think it is a tomour since rats have never had any there in my life time.
Leave it for now and take him to a vets.
I hope this helps!
-Molly