Testes or Abscess?

[souffle]

Sometimes the testicles do sort of push out more one side than the other jay and look like a peanot shaped protusion. Abcesses are usually larger and hot with a yellowish look to under the skin.
If your hamster has a lump which does not go away you should see a vet. Testicular tumours can grow very quickly but if caught early are easily removed. I hope he is just a little hot though and letting it all hang out!