Sore red lump looks like a bite

[andersonesp]

I have 2 male degus and today i found a small lump on the back of ones neck, it looks like a bite mark but he seems to be in no pain, I'm wondering if the other degu has bitten him by grooming too hard or by fighting or perhaps during a dominance display. Basically is it possible the humpy one might have held on too tight wit ye olde teeth during bang bang? should i get him to a vet to be safe?

Thanks :]

[deguconvert]

The fact that it is red suggests that it may well be infected. I don't know what your financial condition is, but if you can afford to have him looked at, it might be a good idea.