Abcess or tumour?

[Blake]

Hi
We have had our Syrian hamster for just over 2 1/2 Years a few days ago he developed a lump under his chin that us now getting bigger and turning black. He is also sleeping more and I think drinking less water. I’m not sure whether it’s a tumour or an abcess? Any thoughts. I spoke to vet to day and he said that he’s a fairly good age for a hamster as I wasn’t sure whether having a procedure was too traumatic for him at his age and could easily get infected from everything I’ve read and seen. Shall I let him just carry on until the inevitable or risk?